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Finding the Fourth Proportional to 1,358.87, 2,039.13 and 666.32

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Solution

The fourth proportional to 1,358.87, 2,039.13 and 666.32 is: 999.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.87 : 2,039.13 = 666.32 : x
  2. Step 2: Convert to fraction form
    1,358.87/2,039.13 = 666.32/x
  3. Step 3: Cross multiply
    1,358.87x = 2,039.13 × 666.32
  4. Step 4: Simplify right side
    1,358.87x = 1,358,702.91
  5. Step 5: Solve for x
    x = 1,358,702.91/1,358.87
  6. Step 6: Final answer
    x = 999.88

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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.