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Finding the Fourth Proportional to 508.53, 702.87 and 449.07

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Solution

The fourth proportional to 508.53, 702.87 and 449.07 is: 620.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.53 : 702.87 = 449.07 : x
  2. Step 2: Convert to fraction form
    508.53/702.87 = 449.07/x
  3. Step 3: Cross multiply
    508.53x = 702.87 × 449.07
  4. Step 4: Simplify right side
    508.53x = 315,637.83
  5. Step 5: Solve for x
    x = 315,637.83/508.53
  6. Step 6: Final answer
    x = 620.69

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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.