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Finding the Fourth Proportional to 624.04, 861.25 and 388.02

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Solution

The fourth proportional to 624.04, 861.25 and 388.02 is: 535.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.04 : 861.25 = 388.02 : x
  2. Step 2: Convert to fraction form
    624.04/861.25 = 388.02/x
  3. Step 3: Cross multiply
    624.04x = 861.25 × 388.02
  4. Step 4: Simplify right side
    624.04x = 334,181.76
  5. Step 5: Solve for x
    x = 334,181.76/624.04
  6. Step 6: Final answer
    x = 535.52

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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.