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Finding the Fourth Proportional to 1,359.52, 2,039.01 and 665.89

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Solution

The fourth proportional to 1,359.52, 2,039.01 and 665.89 is: 998.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.52 : 2,039.01 = 665.89 : x
  2. Step 2: Convert to fraction form
    1,359.52/2,039.01 = 665.89/x
  3. Step 3: Cross multiply
    1,359.52x = 2,039.01 × 665.89
  4. Step 4: Simplify right side
    1,359.52x = 1,357,748.77
  5. Step 5: Solve for x
    x = 1,357,748.77/1,359.52
  6. Step 6: Final answer
    x = 998.70

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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.