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Finding the Fourth Proportional to 714,082.88, 985,444.08 and 391,787.12

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Solution

The fourth proportional to 714,082.88, 985,444.08 and 391,787.12 is: 540,671.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,082.88 : 985,444.08 = 391,787.12 : x
  2. Step 2: Convert to fraction form
    714,082.88/985,444.08 = 391,787.12/x
  3. Step 3: Cross multiply
    714,082.88x = 985,444.08 × 391,787.12
  4. Step 4: Simplify right side
    714,082.88x = 386,084,298,024.25
  5. Step 5: Solve for x
    x = 386,084,298,024.25/714,082.88
  6. Step 6: Final answer
    x = 540,671.55

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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.