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Finding the Fourth Proportional to 527,783.60, 791,675.40 and 128,421.20

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Solution

The fourth proportional to 527,783.60, 791,675.40 and 128,421.20 is: 192,631.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,783.60 : 791,675.40 = 128,421.20 : x
  2. Step 2: Convert to fraction form
    527,783.60/791,675.40 = 128,421.20/x
  3. Step 3: Cross multiply
    527,783.60x = 791,675.40 × 128,421.20
  4. Step 4: Simplify right side
    527,783.60x = 101,667,904,878.48
  5. Step 5: Solve for x
    x = 101,667,904,878.48/527,783.60
  6. Step 6: Final answer
    x = 192,631.80

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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.