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Finding the Fourth Proportional to 426.13, 639.20 and 152.07

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Solution

The fourth proportional to 426.13, 639.20 and 152.07 is: 228.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.13 : 639.20 = 152.07 : x
  2. Step 2: Convert to fraction form
    426.13/639.20 = 152.07/x
  3. Step 3: Cross multiply
    426.13x = 639.20 × 152.07
  4. Step 4: Simplify right side
    426.13x = 97,203.14
  5. Step 5: Solve for x
    x = 97,203.14/426.13
  6. Step 6: Final answer
    x = 228.11

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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.