Home / 638,272.20-957,408.30-322,688.10

Finding the Fourth Proportional to 638,272.20, 957,408.30 and 322,688.10

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Solution

The fourth proportional to 638,272.20, 957,408.30 and 322,688.10 is: 484,032.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,272.20 : 957,408.30 = 322,688.10 : x
  2. Step 2: Convert to fraction form
    638,272.20/957,408.30 = 322,688.10/x
  3. Step 3: Cross multiply
    638,272.20x = 957,408.30 × 322,688.10
  4. Step 4: Simplify right side
    638,272.20x = 308,944,265,251.23
  5. Step 5: Solve for x
    x = 308,944,265,251.23/638,272.20
  6. Step 6: Final answer
    x = 484,032.15

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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.