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Finding the Fourth Proportional to 527,364.40, 790,852.20 and 261,036.40

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Solution

The fourth proportional to 527,364.40, 790,852.20 and 261,036.40 is: 391,458.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,364.40 : 790,852.20 = 261,036.40 : x
  2. Step 2: Convert to fraction form
    527,364.40/790,852.20 = 261,036.40/x
  3. Step 3: Cross multiply
    527,364.40x = 790,852.20 × 261,036.40
  4. Step 4: Simplify right side
    527,364.40x = 206,441,211,220.08
  5. Step 5: Solve for x
    x = 206,441,211,220.08/527,364.40
  6. Step 6: Final answer
    x = 391,458.38

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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.