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Finding the Fourth Proportional to 439.90, 607.05 and 240.74

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Solution

The fourth proportional to 439.90, 607.05 and 240.74 is: 332.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.90 : 607.05 = 240.74 : x
  2. Step 2: Convert to fraction form
    439.90/607.05 = 240.74/x
  3. Step 3: Cross multiply
    439.90x = 607.05 × 240.74
  4. Step 4: Simplify right side
    439.90x = 146,139.43
  5. Step 5: Solve for x
    x = 146,139.43/439.90
  6. Step 6: Final answer
    x = 332.21

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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.