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Finding the Fourth Proportional to 425,422.10, 638,133.15 and 236,465.30

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Solution

The fourth proportional to 425,422.10, 638,133.15 and 236,465.30 is: 354,697.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,422.10 : 638,133.15 = 236,465.30 : x
  2. Step 2: Convert to fraction form
    425,422.10/638,133.15 = 236,465.30/x
  3. Step 3: Cross multiply
    425,422.10x = 638,133.15 × 236,465.30
  4. Step 4: Simplify right side
    425,422.10x = 150,896,346,754.70
  5. Step 5: Solve for x
    x = 150,896,346,754.70/425,422.10
  6. Step 6: Final answer
    x = 354,697.95

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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.