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Finding the Fourth Proportional to 868.16, 1,302.72 and 624.32

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Solution

The fourth proportional to 868.16, 1,302.72 and 624.32 is: 936.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.16 : 1,302.72 = 624.32 : x
  2. Step 2: Convert to fraction form
    868.16/1,302.72 = 624.32/x
  3. Step 3: Cross multiply
    868.16x = 1,302.72 × 624.32
  4. Step 4: Simplify right side
    868.16x = 813,314.15
  5. Step 5: Solve for x
    x = 813,314.15/868.16
  6. Step 6: Final answer
    x = 936.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.