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Finding the Fourth Proportional to 527,801.60, 791,702.40 and 128,439.20

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Solution

The fourth proportional to 527,801.60, 791,702.40 and 128,439.20 is: 192,658.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,801.60 : 791,702.40 = 128,439.20 : x
  2. Step 2: Convert to fraction form
    527,801.60/791,702.40 = 128,439.20/x
  3. Step 3: Cross multiply
    527,801.60x = 791,702.40 × 128,439.20
  4. Step 4: Simplify right side
    527,801.60x = 101,685,622,894.08
  5. Step 5: Solve for x
    x = 101,685,622,894.08/527,801.60
  6. Step 6: Final answer
    x = 192,658.80

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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.