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Finding the Fourth Proportional to 653,862.57, 980,787.57 and 387,431.29

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Solution

The fourth proportional to 653,862.57, 980,787.57 and 387,431.29 is: 581,143.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,862.57 : 980,787.57 = 387,431.29 : x
  2. Step 2: Convert to fraction form
    653,862.57/980,787.57 = 387,431.29/x
  3. Step 3: Cross multiply
    653,862.57x = 980,787.57 × 387,431.29
  4. Step 4: Simplify right side
    653,862.57x = 379,987,793,461.07
  5. Step 5: Solve for x
    x = 379,987,793,461.07/653,862.57
  6. Step 6: Final answer
    x = 581,143.21

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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.