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Finding the Fourth Proportional to 649,689.80, 974,534.70 and 275,664.20

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Solution

The fourth proportional to 649,689.80, 974,534.70 and 275,664.20 is: 413,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,689.80 : 974,534.70 = 275,664.20 : x
  2. Step 2: Convert to fraction form
    649,689.80/974,534.70 = 275,664.20/x
  3. Step 3: Cross multiply
    649,689.80x = 974,534.70 × 275,664.20
  4. Step 4: Simplify right side
    649,689.80x = 268,644,328,447.74
  5. Step 5: Solve for x
    x = 268,644,328,447.74/649,689.80
  6. Step 6: Final answer
    x = 413,496.30

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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.