Home / 820,981.40-1,231,472.10-485,058.20

Finding the Fourth Proportional to 820,981.40, 1,231,472.10 and 485,058.20

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Solution

The fourth proportional to 820,981.40, 1,231,472.10 and 485,058.20 is: 727,587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,981.40 : 1,231,472.10 = 485,058.20 : x
  2. Step 2: Convert to fraction form
    820,981.40/1,231,472.10 = 485,058.20/x
  3. Step 3: Cross multiply
    820,981.40x = 1,231,472.10 × 485,058.20
  4. Step 4: Simplify right side
    820,981.40x = 597,335,640,176.22
  5. Step 5: Solve for x
    x = 597,335,640,176.22/820,981.40
  6. Step 6: Final answer
    x = 727,587.30

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Double scale
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Similar ratio
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1.5x scale

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.