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Finding the Fourth Proportional to 611,924,351.70, 917,886,527.55 and 490,991,999.70

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Solution

The fourth proportional to 611,924,351.70, 917,886,527.55 and 490,991,999.70 is: 736,487,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,924,351.70 : 917,886,527.55 = 490,991,999.70 : x
  2. Step 2: Convert to fraction form
    611,924,351.70/917,886,527.55 = 490,991,999.70/x
  3. Step 3: Cross multiply
    611,924,351.70x = 917,886,527.55 × 490,991,999.70
  4. Step 4: Simplify right side
    611,924,351.70x = 450,674,941,659,463,616
  5. Step 5: Solve for x
    x = 450,674,941,659,463,616/611,924,351.70
  6. Step 6: Final answer
    x = 736,487,999.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.