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Finding the Fourth Proportional to 642,615.60, 963,923.40 and 612,202.80

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Solution

The fourth proportional to 642,615.60, 963,923.40 and 612,202.80 is: 918,304.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,615.60 : 963,923.40 = 612,202.80 : x
  2. Step 2: Convert to fraction form
    642,615.60/963,923.40 = 612,202.80/x
  3. Step 3: Cross multiply
    642,615.60x = 963,923.40 × 612,202.80
  4. Step 4: Simplify right side
    642,615.60x = 590,116,604,465.52
  5. Step 5: Solve for x
    x = 590,116,604,465.52/642,615.60
  6. Step 6: Final answer
    x = 918,304.20

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Half scale
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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.