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Finding the Fourth Proportional to 425,854.68, 638,782.29 and 238,997.40

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Solution

The fourth proportional to 425,854.68, 638,782.29 and 238,997.40 is: 358,496.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,854.68 : 638,782.29 = 238,997.40 : x
  2. Step 2: Convert to fraction form
    425,854.68/638,782.29 = 238,997.40/x
  3. Step 3: Cross multiply
    425,854.68x = 638,782.29 × 238,997.40
  4. Step 4: Simplify right side
    425,854.68x = 152,667,306,476.05
  5. Step 5: Solve for x
    x = 152,667,306,476.05/425,854.68
  6. Step 6: Final answer
    x = 358,496.25

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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.