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Finding the Fourth Proportional to 435.61, 653.36 and 127.38

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Solution

The fourth proportional to 435.61, 653.36 and 127.38 is: 191.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.61 : 653.36 = 127.38 : x
  2. Step 2: Convert to fraction form
    435.61/653.36 = 127.38/x
  3. Step 3: Cross multiply
    435.61x = 653.36 × 127.38
  4. Step 4: Simplify right side
    435.61x = 83,226.81
  5. Step 5: Solve for x
    x = 83,226.81/435.61
  6. Step 6: Final answer
    x = 191.06

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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.