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Finding the Fourth Proportional to 657,420.90, 986,229.90 and 278,340.90

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Solution

The fourth proportional to 657,420.90, 986,229.90 and 278,340.90 is: 417,553.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,420.90 : 986,229.90 = 278,340.90 : x
  2. Step 2: Convert to fraction form
    657,420.90/986,229.90 = 278,340.90/x
  3. Step 3: Cross multiply
    657,420.90x = 986,229.90 × 278,340.90
  4. Step 4: Simplify right side
    657,420.90x = 274,508,117,972.91
  5. Step 5: Solve for x
    x = 274,508,117,972.91/657,420.90
  6. Step 6: Final answer
    x = 417,553.07

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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.