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Finding the Fourth Proportional to 981,706.30, 1,471,695.45 and 665,136.70

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Solution

The fourth proportional to 981,706.30, 1,471,695.45 and 665,136.70 is: 997,119.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    981,706.30 : 1,471,695.45 = 665,136.70 : x
  2. Step 2: Convert to fraction form
    981,706.30/1,471,695.45 = 665,136.70/x
  3. Step 3: Cross multiply
    981,706.30x = 1,471,695.45 × 665,136.70
  4. Step 4: Simplify right side
    981,706.30x = 978,878,655,018.02
  5. Step 5: Solve for x
    x = 978,878,655,018.02/981,706.30
  6. Step 6: Final answer
    x = 997,119.66

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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.