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Finding the Fourth Proportional to 515,999.70, 773,999.55 and 397,901.70

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Solution

The fourth proportional to 515,999.70, 773,999.55 and 397,901.70 is: 596,852.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,999.70 : 773,999.55 = 397,901.70 : x
  2. Step 2: Convert to fraction form
    515,999.70/773,999.55 = 397,901.70/x
  3. Step 3: Cross multiply
    515,999.70x = 773,999.55 × 397,901.70
  4. Step 4: Simplify right side
    515,999.70x = 307,975,736,744.24
  5. Step 5: Solve for x
    x = 307,975,736,744.24/515,999.70
  6. Step 6: Final answer
    x = 596,852.55

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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.