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Finding the Fourth Proportional to 714,609.50, 986,162.76 and 392,340.33

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Solution

The fourth proportional to 714,609.50, 986,162.76 and 392,340.33 is: 541,430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,609.50 : 986,162.76 = 392,340.33 : x
  2. Step 2: Convert to fraction form
    714,609.50/986,162.76 = 392,340.33/x
  3. Step 3: Cross multiply
    714,609.50x = 986,162.76 × 392,340.33
  4. Step 4: Simplify right side
    714,609.50x = 386,911,422,692.11
  5. Step 5: Solve for x
    x = 386,911,422,692.11/714,609.50
  6. Step 6: Final answer
    x = 541,430.57

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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.