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Finding the Fourth Proportional to 620,785.40, 932,359.14 and 385,770.38

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Solution

The fourth proportional to 620,785.40, 932,359.14 and 385,770.38 is: 579,389.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,785.40 : 932,359.14 = 385,770.38 : x
  2. Step 2: Convert to fraction form
    620,785.40/932,359.14 = 385,770.38/x
  3. Step 3: Cross multiply
    620,785.40x = 932,359.14 × 385,770.38
  4. Step 4: Simplify right side
    620,785.40x = 359,676,535,072.48
  5. Step 5: Solve for x
    x = 359,676,535,072.48/620,785.40
  6. Step 6: Final answer
    x = 579,389.49

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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.