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Finding the Fourth Proportional to 714,988.44, 986,695.92 and 392,728.32

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Solution

The fourth proportional to 714,988.44, 986,695.92 and 392,728.32 is: 541,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,988.44 : 986,695.92 = 392,728.32 : x
  2. Step 2: Convert to fraction form
    714,988.44/986,695.92 = 392,728.32/x
  3. Step 3: Cross multiply
    714,988.44x = 986,695.92 × 392,728.32
  4. Step 4: Simplify right side
    714,988.44x = 387,503,431,012.45
  5. Step 5: Solve for x
    x = 387,503,431,012.45/714,988.44
  6. Step 6: Final answer
    x = 541,971.60

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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.