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Finding the Fourth Proportional to 624.08, 861.03 and 402.63

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Solution

The fourth proportional to 624.08, 861.03 and 402.63 is: 555.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.08 : 861.03 = 402.63 : x
  2. Step 2: Convert to fraction form
    624.08/861.03 = 402.63/x
  3. Step 3: Cross multiply
    624.08x = 861.03 × 402.63
  4. Step 4: Simplify right side
    624.08x = 346,676.51
  5. Step 5: Solve for x
    x = 346,676.51/624.08
  6. Step 6: Final answer
    x = 555.50

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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.