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Finding the Fourth Proportional to 624.16, 860.64 and 458.16

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Solution

The fourth proportional to 624.16, 860.64 and 458.16 is: 631.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.16 : 860.64 = 458.16 : x
  2. Step 2: Convert to fraction form
    624.16/860.64 = 458.16/x
  3. Step 3: Cross multiply
    624.16x = 860.64 × 458.16
  4. Step 4: Simplify right side
    624.16x = 394,310.82
  5. Step 5: Solve for x
    x = 394,310.82/624.16
  6. Step 6: Final answer
    x = 631.75

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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.