Home / 638,438.10-957,171.15-323,121.30

Finding the Fourth Proportional to 638,438.10, 957,171.15 and 323,121.30

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Solution

The fourth proportional to 638,438.10, 957,171.15 and 323,121.30 is: 484,435.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,438.10 : 957,171.15 = 323,121.30 : x
  2. Step 2: Convert to fraction form
    638,438.10/957,171.15 = 323,121.30/x
  3. Step 3: Cross multiply
    638,438.10x = 957,171.15 × 323,121.30
  4. Step 4: Simplify right side
    638,438.10x = 309,282,386,310.50
  5. Step 5: Solve for x
    x = 309,282,386,310.50/638,438.10
  6. Step 6: Final answer
    x = 484,435.98

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Double scale
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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.