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Finding the Fourth Proportional to 307,885.40, 425,175.28 and 291,112.02

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Solution

The fourth proportional to 307,885.40, 425,175.28 and 291,112.02 is: 402,012.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,885.40 : 425,175.28 = 291,112.02 : x
  2. Step 2: Convert to fraction form
    307,885.40/425,175.28 = 291,112.02/x
  3. Step 3: Cross multiply
    307,885.40x = 425,175.28 × 291,112.02
  4. Step 4: Simplify right side
    307,885.40x = 123,773,634,614.87
  5. Step 5: Solve for x
    x = 123,773,634,614.87/307,885.40
  6. Step 6: Final answer
    x = 402,012.03

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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.