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Finding the Fourth Proportional to 527,802.60, 791,703.90 and 128,440.20

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Solution

The fourth proportional to 527,802.60, 791,703.90 and 128,440.20 is: 192,660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,802.60 : 791,703.90 = 128,440.20 : x
  2. Step 2: Convert to fraction form
    527,802.60/791,703.90 = 128,440.20/x
  3. Step 3: Cross multiply
    527,802.60x = 791,703.90 × 128,440.20
  4. Step 4: Simplify right side
    527,802.60x = 101,686,607,256.78
  5. Step 5: Solve for x
    x = 101,686,607,256.78/527,802.60
  6. Step 6: Final answer
    x = 192,660.30

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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.