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Finding the Fourth Proportional to 338,281.56, 507,469.68 and 138,630.30

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Solution

The fourth proportional to 338,281.56, 507,469.68 and 138,630.30 is: 207,964.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,281.56 : 507,469.68 = 138,630.30 : x
  2. Step 2: Convert to fraction form
    338,281.56/507,469.68 = 138,630.30/x
  3. Step 3: Cross multiply
    338,281.56x = 507,469.68 × 138,630.30
  4. Step 4: Simplify right side
    338,281.56x = 70,350,673,979.30
  5. Step 5: Solve for x
    x = 70,350,673,979.30/338,281.56
  6. Step 6: Final answer
    x = 207,964.85

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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.