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Finding the Fourth Proportional to 439.85, 607.10 and 292.49

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Solution

The fourth proportional to 439.85, 607.10 and 292.49 is: 403.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.85 : 607.10 = 292.49 : x
  2. Step 2: Convert to fraction form
    439.85/607.10 = 292.49/x
  3. Step 3: Cross multiply
    439.85x = 607.10 × 292.49
  4. Step 4: Simplify right side
    439.85x = 177,569.22
  5. Step 5: Solve for x
    x = 177,569.22/439.85
  6. Step 6: Final answer
    x = 403.70

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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.