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Finding the Fourth Proportional to 690,892.74, 953,433.92 and 400,560.73

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Solution

The fourth proportional to 690,892.74, 953,433.92 and 400,560.73 is: 552,774.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,892.74 : 953,433.92 = 400,560.73 : x
  2. Step 2: Convert to fraction form
    690,892.74/953,433.92 = 400,560.73/x
  3. Step 3: Cross multiply
    690,892.74x = 953,433.92 × 400,560.73
  4. Step 4: Simplify right side
    690,892.74x = 381,908,180,231.99
  5. Step 5: Solve for x
    x = 381,908,180,231.99/690,892.74
  6. Step 6: Final answer
    x = 552,774.92

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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.