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Finding the Fourth Proportional to 624.71, 862.45 and 477.63

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Solution

The fourth proportional to 624.71, 862.45 and 477.63 is: 659.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.71 : 862.45 = 477.63 : x
  2. Step 2: Convert to fraction form
    624.71/862.45 = 477.63/x
  3. Step 3: Cross multiply
    624.71x = 862.45 × 477.63
  4. Step 4: Simplify right side
    624.71x = 411,930.80
  5. Step 5: Solve for x
    x = 411,930.80/624.71
  6. Step 6: Final answer
    x = 659.39

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1.5x scale

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.