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Finding the Fourth Proportional to 1,331.87, 1,997.55 and 358.05

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Solution

The fourth proportional to 1,331.87, 1,997.55 and 358.05 is: 537.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.87 : 1,997.55 = 358.05 : x
  2. Step 2: Convert to fraction form
    1,331.87/1,997.55 = 358.05/x
  3. Step 3: Cross multiply
    1,331.87x = 1,997.55 × 358.05
  4. Step 4: Simplify right side
    1,331.87x = 715,222.78
  5. Step 5: Solve for x
    x = 715,222.78/1,331.87
  6. Step 6: Final answer
    x = 537.01

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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.