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Finding the Fourth Proportional to 674,355.43, 930,674.82 and 368,478.31

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Solution

The fourth proportional to 674,355.43, 930,674.82 and 368,478.31 is: 508,535.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,355.43 : 930,674.82 = 368,478.31 : x
  2. Step 2: Convert to fraction form
    674,355.43/930,674.82 = 368,478.31/x
  3. Step 3: Cross multiply
    674,355.43x = 930,674.82 × 368,478.31
  4. Step 4: Simplify right side
    674,355.43x = 342,933,484,833.15
  5. Step 5: Solve for x
    x = 342,933,484,833.15/674,355.43
  6. Step 6: Final answer
    x = 508,535.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.