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Finding the Fourth Proportional to 714,670.14, 986,246.76 and 392,401.11

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Solution

The fourth proportional to 714,670.14, 986,246.76 and 392,401.11 is: 541,514.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,670.14 : 986,246.76 = 392,401.11 : x
  2. Step 2: Convert to fraction form
    714,670.14/986,246.76 = 392,401.11/x
  3. Step 3: Cross multiply
    714,670.14x = 986,246.76 × 392,401.11
  4. Step 4: Simplify right side
    714,670.14x = 387,004,323,357.90
  5. Step 5: Solve for x
    x = 387,004,323,357.90/714,670.14
  6. Step 6: Final answer
    x = 541,514.61

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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.