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Finding the Fourth Proportional to 690,881.87, 953,418.94 and 400,549.73

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Solution

The fourth proportional to 690,881.87, 953,418.94 and 400,549.73 is: 552,759.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,881.87 : 953,418.94 = 400,549.73 : x
  2. Step 2: Convert to fraction form
    690,881.87/953,418.94 = 400,549.73/x
  3. Step 3: Cross multiply
    690,881.87x = 953,418.94 × 400,549.73
  4. Step 4: Simplify right side
    690,881.87x = 381,891,693,225.42
  5. Step 5: Solve for x
    x = 381,891,693,225.42/690,881.87
  6. Step 6: Final answer
    x = 552,759.75

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.