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Finding the Fourth Proportional to 641,716.80, 962,575.20 and 638,030.40

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Solution

The fourth proportional to 641,716.80, 962,575.20 and 638,030.40 is: 957,045.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,716.80 : 962,575.20 = 638,030.40 : x
  2. Step 2: Convert to fraction form
    641,716.80/962,575.20 = 638,030.40/x
  3. Step 3: Cross multiply
    641,716.80x = 962,575.20 × 638,030.40
  4. Step 4: Simplify right side
    641,716.80x = 614,152,239,886.08
  5. Step 5: Solve for x
    x = 614,152,239,886.08/641,716.80
  6. Step 6: Final answer
    x = 957,045.60

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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.