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Finding the Fourth Proportional to 301.40, 452.16 and 139.13

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Solution

The fourth proportional to 301.40, 452.16 and 139.13 is: 208.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.40 : 452.16 = 139.13 : x
  2. Step 2: Convert to fraction form
    301.40/452.16 = 139.13/x
  3. Step 3: Cross multiply
    301.40x = 452.16 × 139.13
  4. Step 4: Simplify right side
    301.40x = 62,909.02
  5. Step 5: Solve for x
    x = 62,909.02/301.40
  6. Step 6: Final answer
    x = 208.72

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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.