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Finding the Fourth Proportional to 463.34, 695.08 and 138.72

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Solution

The fourth proportional to 463.34, 695.08 and 138.72 is: 208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.34 : 695.08 = 138.72 : x
  2. Step 2: Convert to fraction form
    463.34/695.08 = 138.72/x
  3. Step 3: Cross multiply
    463.34x = 695.08 × 138.72
  4. Step 4: Simplify right side
    463.34x = 96,421.50
  5. Step 5: Solve for x
    x = 96,421.50/463.34
  6. Step 6: Final answer
    x = 208.10

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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.