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Finding the Fourth Proportional to 705.30, 972.78 and 625.62

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Solution

The fourth proportional to 705.30, 972.78 and 625.62 is: 862.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.30 : 972.78 = 625.62 : x
  2. Step 2: Convert to fraction form
    705.30/972.78 = 625.62/x
  3. Step 3: Cross multiply
    705.30x = 972.78 × 625.62
  4. Step 4: Simplify right side
    705.30x = 608,590.62
  5. Step 5: Solve for x
    x = 608,590.62/705.30
  6. Step 6: Final answer
    x = 862.88

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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.