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Finding the Fourth Proportional to 539,031.20, 806,991.60 and 329,079.20

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Solution

The fourth proportional to 539,031.20, 806,991.60 and 329,079.20 is: 492,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,031.20 : 806,991.60 = 329,079.20 : x
  2. Step 2: Convert to fraction form
    539,031.20/806,991.60 = 329,079.20/x
  3. Step 3: Cross multiply
    539,031.20x = 806,991.60 × 329,079.20
  4. Step 4: Simplify right side
    539,031.20x = 265,564,150,134.72
  5. Step 5: Solve for x
    x = 265,564,150,134.72/539,031.20
  6. Step 6: Final answer
    x = 492,669.35

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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.