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Finding the Fourth Proportional to 439,503.60, 655,560.54 and 399,141.15

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Solution

The fourth proportional to 439,503.60, 655,560.54 and 399,141.15 is: 595,356.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,503.60 : 655,560.54 = 399,141.15 : x
  2. Step 2: Convert to fraction form
    439,503.60/655,560.54 = 399,141.15/x
  3. Step 3: Cross multiply
    439,503.60x = 655,560.54 × 399,141.15
  4. Step 4: Simplify right side
    439,503.60x = 261,661,187,830.22
  5. Step 5: Solve for x
    x = 261,661,187,830.22/439,503.60
  6. Step 6: Final answer
    x = 595,356.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.