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Finding the Fourth Proportional to 868.16, 1,300.88 and 542.54

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Solution

The fourth proportional to 868.16, 1,300.88 and 542.54 is: 812.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.16 : 1,300.88 = 542.54 : x
  2. Step 2: Convert to fraction form
    868.16/1,300.88 = 542.54/x
  3. Step 3: Cross multiply
    868.16x = 1,300.88 × 542.54
  4. Step 4: Simplify right side
    868.16x = 705,779.44
  5. Step 5: Solve for x
    x = 705,779.44/868.16
  6. Step 6: Final answer
    x = 812.96

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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.