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Finding the Fourth Proportional to 301.64, 452.32 and 139.20

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Solution

The fourth proportional to 301.64, 452.32 and 139.20 is: 208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.64 : 452.32 = 139.20 : x
  2. Step 2: Convert to fraction form
    301.64/452.32 = 139.20/x
  3. Step 3: Cross multiply
    301.64x = 452.32 × 139.20
  4. Step 4: Simplify right side
    301.64x = 62,962.94
  5. Step 5: Solve for x
    x = 62,962.94/301.64
  6. Step 6: Final answer
    x = 208.74

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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.