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Finding the Fourth Proportional to 1,141.17, 1,712.01 and 400.89

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Solution

The fourth proportional to 1,141.17, 1,712.01 and 400.89 is: 601.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.17 : 1,712.01 = 400.89 : x
  2. Step 2: Convert to fraction form
    1,141.17/1,712.01 = 400.89/x
  3. Step 3: Cross multiply
    1,141.17x = 1,712.01 × 400.89
  4. Step 4: Simplify right side
    1,141.17x = 686,327.69
  5. Step 5: Solve for x
    x = 686,327.69/1,141.17
  6. Step 6: Final answer
    x = 601.42

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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.