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Finding the Fourth Proportional to 620,305.60, 930,458.40 and 407,729.20

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Solution

The fourth proportional to 620,305.60, 930,458.40 and 407,729.20 is: 611,593.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,305.60 : 930,458.40 = 407,729.20 : x
  2. Step 2: Convert to fraction form
    620,305.60/930,458.40 = 407,729.20/x
  3. Step 3: Cross multiply
    620,305.60x = 930,458.40 × 407,729.20
  4. Step 4: Simplify right side
    620,305.60x = 379,375,059,065.28
  5. Step 5: Solve for x
    x = 379,375,059,065.28/620,305.60
  6. Step 6: Final answer
    x = 611,593.80

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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.