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Finding the Fourth Proportional to 508.95, 702.32 and 287.89

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Solution

The fourth proportional to 508.95, 702.32 and 287.89 is: 397.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.95 : 702.32 = 287.89 : x
  2. Step 2: Convert to fraction form
    508.95/702.32 = 287.89/x
  3. Step 3: Cross multiply
    508.95x = 702.32 × 287.89
  4. Step 4: Simplify right side
    508.95x = 202,187.71
  5. Step 5: Solve for x
    x = 202,187.71/508.95
  6. Step 6: Final answer
    x = 397.26

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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.