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Finding the Fourth Proportional to 542.04, 812.14 and 387.18

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Solution

The fourth proportional to 542.04, 812.14 and 387.18 is: 580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.04 : 812.14 = 387.18 : x
  2. Step 2: Convert to fraction form
    542.04/812.14 = 387.18/x
  3. Step 3: Cross multiply
    542.04x = 812.14 × 387.18
  4. Step 4: Simplify right side
    542.04x = 314,445.58
  5. Step 5: Solve for x
    x = 314,445.58/542.04
  6. Step 6: Final answer
    x = 580.11

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1.5x scale

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.