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Finding the Fourth Proportional to 624.40, 861.75 and 458.67

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Solution

The fourth proportional to 624.40, 861.75 and 458.67 is: 633.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.40 : 861.75 = 458.67 : x
  2. Step 2: Convert to fraction form
    624.40/861.75 = 458.67/x
  3. Step 3: Cross multiply
    624.40x = 861.75 × 458.67
  4. Step 4: Simplify right side
    624.40x = 395,258.87
  5. Step 5: Solve for x
    x = 395,258.87/624.40
  6. Step 6: Final answer
    x = 633.02

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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.