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Finding the Fourth Proportional to 1,132.49, 1,698.90 and 401.90

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Solution

The fourth proportional to 1,132.49, 1,698.90 and 401.90 is: 602.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.49 : 1,698.90 = 401.90 : x
  2. Step 2: Convert to fraction form
    1,132.49/1,698.90 = 401.90/x
  3. Step 3: Cross multiply
    1,132.49x = 1,698.90 × 401.90
  4. Step 4: Simplify right side
    1,132.49x = 682,780.92
  5. Step 5: Solve for x
    x = 682,780.92/1,132.49
  6. Step 6: Final answer
    x = 602.90

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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.