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Finding the Fourth Proportional to 714,665.64, 986,240.54 and 392,396.61

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Solution

The fourth proportional to 714,665.64, 986,240.54 and 392,396.61 is: 541,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,665.64 : 986,240.54 = 392,396.61 : x
  2. Step 2: Convert to fraction form
    714,665.64/986,240.54 = 392,396.61/x
  3. Step 3: Cross multiply
    714,665.64x = 986,240.54 × 392,396.61
  4. Step 4: Simplify right side
    714,665.64x = 386,997,444,540.57
  5. Step 5: Solve for x
    x = 386,997,444,540.57/714,665.64
  6. Step 6: Final answer
    x = 541,508.40

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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.