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Finding the Fourth Proportional to 387.10, 534.16 and 219.04

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Solution

The fourth proportional to 387.10, 534.16 and 219.04 is: 302.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.10 : 534.16 = 219.04 : x
  2. Step 2: Convert to fraction form
    387.10/534.16 = 219.04/x
  3. Step 3: Cross multiply
    387.10x = 534.16 × 219.04
  4. Step 4: Simplify right side
    387.10x = 117,002.41
  5. Step 5: Solve for x
    x = 117,002.41/387.10
  6. Step 6: Final answer
    x = 302.25

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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.