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Finding the Fourth Proportional to 508.90, 702.71 and 322.72

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Solution

The fourth proportional to 508.90, 702.71 and 322.72 is: 445.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.90 : 702.71 = 322.72 : x
  2. Step 2: Convert to fraction form
    508.90/702.71 = 322.72/x
  3. Step 3: Cross multiply
    508.90x = 702.71 × 322.72
  4. Step 4: Simplify right side
    508.90x = 226,774.25
  5. Step 5: Solve for x
    x = 226,774.25/508.90
  6. Step 6: Final answer
    x = 445.62

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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.