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Finding the Fourth Proportional to 714,626.68, 986,186.54 and 392,357.55

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Solution

The fourth proportional to 714,626.68, 986,186.54 and 392,357.55 is: 541,454.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,626.68 : 986,186.54 = 392,357.55 : x
  2. Step 2: Convert to fraction form
    714,626.68/986,186.54 = 392,357.55/x
  3. Step 3: Cross multiply
    714,626.68x = 986,186.54 × 392,357.55
  4. Step 4: Simplify right side
    714,626.68x = 386,937,727,784.66
  5. Step 5: Solve for x
    x = 386,937,727,784.66/714,626.68
  6. Step 6: Final answer
    x = 541,454.35

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Double scale
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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.