Home / 638,116.20-957,174.30-319,251.60

Finding the Fourth Proportional to 638,116.20, 957,174.30 and 319,251.60

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Solution

The fourth proportional to 638,116.20, 957,174.30 and 319,251.60 is: 478,877.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,116.20 : 957,174.30 = 319,251.60 : x
  2. Step 2: Convert to fraction form
    638,116.20/957,174.30 = 319,251.60/x
  3. Step 3: Cross multiply
    638,116.20x = 957,174.30 × 319,251.60
  4. Step 4: Simplify right side
    638,116.20x = 305,579,426,753.88
  5. Step 5: Solve for x
    x = 305,579,426,753.88/638,116.20
  6. Step 6: Final answer
    x = 478,877.40

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Half scale
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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.