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Finding the Fourth Proportional to 508.83, 702.52 and 312.68

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Solution

The fourth proportional to 508.83, 702.52 and 312.68 is: 431.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.83 : 702.52 = 312.68 : x
  2. Step 2: Convert to fraction form
    508.83/702.52 = 312.68/x
  3. Step 3: Cross multiply
    508.83x = 702.52 × 312.68
  4. Step 4: Simplify right side
    508.83x = 219,658.88
  5. Step 5: Solve for x
    x = 219,658.88/508.83
  6. Step 6: Final answer
    x = 431.70

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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.