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Finding the Fourth Proportional to 542,405.80, 813,608.70 and 261,951.40

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Solution

The fourth proportional to 542,405.80, 813,608.70 and 261,951.40 is: 392,927.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,405.80 : 813,608.70 = 261,951.40 : x
  2. Step 2: Convert to fraction form
    542,405.80/813,608.70 = 261,951.40/x
  3. Step 3: Cross multiply
    542,405.80x = 813,608.70 × 261,951.40
  4. Step 4: Simplify right side
    542,405.80x = 213,125,938,017.18
  5. Step 5: Solve for x
    x = 213,125,938,017.18/542,405.80
  6. Step 6: Final answer
    x = 392,927.10

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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.