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Finding the Fourth Proportional to 665,137.80, 997,706.70 and 654,640.20

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Solution

The fourth proportional to 665,137.80, 997,706.70 and 654,640.20 is: 981,960.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,137.80 : 997,706.70 = 654,640.20 : x
  2. Step 2: Convert to fraction form
    665,137.80/997,706.70 = 654,640.20/x
  3. Step 3: Cross multiply
    665,137.80x = 997,706.70 × 654,640.20
  4. Step 4: Simplify right side
    665,137.80x = 653,138,913,629.34
  5. Step 5: Solve for x
    x = 653,138,913,629.34/665,137.80
  6. Step 6: Final answer
    x = 981,960.30

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Double scale
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Similar ratio
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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.