Home / 923,139.20-1,385,227.20-390,569.60

Finding the Fourth Proportional to 923,139.20, 1,385,227.20 and 390,569.60

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Solution

The fourth proportional to 923,139.20, 1,385,227.20 and 390,569.60 is: 586,073.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    923,139.20 : 1,385,227.20 = 390,569.60 : x
  2. Step 2: Convert to fraction form
    923,139.20/1,385,227.20 = 390,569.60/x
  3. Step 3: Cross multiply
    923,139.20x = 1,385,227.20 × 390,569.60
  4. Step 4: Simplify right side
    923,139.20x = 541,027,633,413.12
  5. Step 5: Solve for x
    x = 541,027,633,413.12/923,139.20
  6. Step 6: Final answer
    x = 586,073.73

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.