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Finding the Fourth Proportional to 714,995.96, 986,706.28 and 392,735.84

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Solution

The fourth proportional to 714,995.96, 986,706.28 and 392,735.84 is: 541,981.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,995.96 : 986,706.28 = 392,735.84 : x
  2. Step 2: Convert to fraction form
    714,995.96/986,706.28 = 392,735.84/x
  3. Step 3: Cross multiply
    714,995.96x = 986,706.28 × 392,735.84
  4. Step 4: Simplify right side
    714,995.96x = 387,514,919,709.08
  5. Step 5: Solve for x
    x = 387,514,919,709.08/714,995.96
  6. Step 6: Final answer
    x = 541,981.97

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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.