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Finding the Fourth Proportional to 705.62, 972.24 and 508.79

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Solution

The fourth proportional to 705.62, 972.24 and 508.79 is: 701.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.62 : 972.24 = 508.79 : x
  2. Step 2: Convert to fraction form
    705.62/972.24 = 508.79/x
  3. Step 3: Cross multiply
    705.62x = 972.24 × 508.79
  4. Step 4: Simplify right side
    705.62x = 494,665.99
  5. Step 5: Solve for x
    x = 494,665.99/705.62
  6. Step 6: Final answer
    x = 701.04

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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.