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Finding the Fourth Proportional to 390,591.08, 539,024.82 and 220,835.24

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Solution

The fourth proportional to 390,591.08, 539,024.82 and 220,835.24 is: 304,757.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,591.08 : 539,024.82 = 220,835.24 : x
  2. Step 2: Convert to fraction form
    390,591.08/539,024.82 = 220,835.24/x
  3. Step 3: Cross multiply
    390,591.08x = 539,024.82 × 220,835.24
  4. Step 4: Simplify right side
    390,591.08x = 119,035,675,490.66
  5. Step 5: Solve for x
    x = 119,035,675,490.66/390,591.08
  6. Step 6: Final answer
    x = 304,757.79

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1.5x scale

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.