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Finding the Fourth Proportional to 307,882.40, 425,171.15 and 291,109.02

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Solution

The fourth proportional to 307,882.40, 425,171.15 and 291,109.02 is: 402,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,882.40 : 425,171.15 = 291,109.02 : x
  2. Step 2: Convert to fraction form
    307,882.40/425,171.15 = 291,109.02/x
  3. Step 3: Cross multiply
    307,882.40x = 425,171.15 × 291,109.02
  4. Step 4: Simplify right side
    307,882.40x = 123,771,155,353.23
  5. Step 5: Solve for x
    x = 123,771,155,353.23/307,882.40
  6. Step 6: Final answer
    x = 402,007.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.