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Finding the Fourth Proportional to 539,008.95, 743,830.86 and 309,581.13

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Solution

The fourth proportional to 539,008.95, 743,830.86 and 309,581.13 is: 427,221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,008.95 : 743,830.86 = 309,581.13 : x
  2. Step 2: Convert to fraction form
    539,008.95/743,830.86 = 309,581.13/x
  3. Step 3: Cross multiply
    539,008.95x = 743,830.86 × 309,581.13
  4. Step 4: Simplify right side
    539,008.95x = 230,275,998,167.67
  5. Step 5: Solve for x
    x = 230,275,998,167.67/539,008.95
  6. Step 6: Final answer
    x = 427,221.10

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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.