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Finding the Fourth Proportional to 485,249.90, 669,694.69 and 291,720.26

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Solution

The fourth proportional to 485,249.90, 669,694.69 and 291,720.26 is: 402,603.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,249.90 : 669,694.69 = 291,720.26 : x
  2. Step 2: Convert to fraction form
    485,249.90/669,694.69 = 291,720.26/x
  3. Step 3: Cross multiply
    485,249.90x = 669,694.69 × 291,720.26
  4. Step 4: Simplify right side
    485,249.90x = 195,363,512,301.12
  5. Step 5: Solve for x
    x = 195,363,512,301.12/485,249.90
  6. Step 6: Final answer
    x = 402,603.92

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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.