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Finding the Fourth Proportional to 624.21, 861.77 and 414.68

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Solution

The fourth proportional to 624.21, 861.77 and 414.68 is: 572.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.21 : 861.77 = 414.68 : x
  2. Step 2: Convert to fraction form
    624.21/861.77 = 414.68/x
  3. Step 3: Cross multiply
    624.21x = 861.77 × 414.68
  4. Step 4: Simplify right side
    624.21x = 357,355.51
  5. Step 5: Solve for x
    x = 357,355.51/624.21
  6. Step 6: Final answer
    x = 572.49

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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.