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Finding the Fourth Proportional to 1,159.65, 1,737.58 and 665.45

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Solution

The fourth proportional to 1,159.65, 1,737.58 and 665.45 is: 997.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.65 : 1,737.58 = 665.45 : x
  2. Step 2: Convert to fraction form
    1,159.65/1,737.58 = 665.45/x
  3. Step 3: Cross multiply
    1,159.65x = 1,737.58 × 665.45
  4. Step 4: Simplify right side
    1,159.65x = 1,156,272.61
  5. Step 5: Solve for x
    x = 1,156,272.61/1,159.65
  6. Step 6: Final answer
    x = 997.09

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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.