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Finding the Fourth Proportional to 681,509.17, 940,478.32 and 371,411.20

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Solution

The fourth proportional to 681,509.17, 940,478.32 and 371,411.20 is: 512,545.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,509.17 : 940,478.32 = 371,411.20 : x
  2. Step 2: Convert to fraction form
    681,509.17/940,478.32 = 371,411.20/x
  3. Step 3: Cross multiply
    681,509.17x = 940,478.32 × 371,411.20
  4. Step 4: Simplify right side
    681,509.17x = 349,304,179,355.36
  5. Step 5: Solve for x
    x = 349,304,179,355.36/681,509.17
  6. Step 6: Final answer
    x = 512,545.09

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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.