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Finding the Fourth Proportional to 425,433.48, 638,543.94 and 215,219.04

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Solution

The fourth proportional to 425,433.48, 638,543.94 and 215,219.04 is: 323,027.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,433.48 : 638,543.94 = 215,219.04 : x
  2. Step 2: Convert to fraction form
    425,433.48/638,543.94 = 215,219.04/x
  3. Step 3: Cross multiply
    425,433.48x = 638,543.94 × 215,219.04
  4. Step 4: Simplify right side
    425,433.48x = 137,426,813,764.62
  5. Step 5: Solve for x
    x = 137,426,813,764.62/425,433.48
  6. Step 6: Final answer
    x = 323,027.74

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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.