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Finding the Fourth Proportional to 624.08, 860.55 and 571.16

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Solution

The fourth proportional to 624.08, 860.55 and 571.16 is: 787.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.08 : 860.55 = 571.16 : x
  2. Step 2: Convert to fraction form
    624.08/860.55 = 571.16/x
  3. Step 3: Cross multiply
    624.08x = 860.55 × 571.16
  4. Step 4: Simplify right side
    624.08x = 491,511.74
  5. Step 5: Solve for x
    x = 491,511.74/624.08
  6. Step 6: Final answer
    x = 787.58

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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.