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Finding the Fourth Proportional to 425,622.90, 638,110.35 and 215,411.70

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Solution

The fourth proportional to 425,622.90, 638,110.35 and 215,411.70 is: 322,953.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,622.90 : 638,110.35 = 215,411.70 : x
  2. Step 2: Convert to fraction form
    425,622.90/638,110.35 = 215,411.70/x
  3. Step 3: Cross multiply
    425,622.90x = 638,110.35 × 215,411.70
  4. Step 4: Simplify right side
    425,622.90x = 137,456,435,281.10
  5. Step 5: Solve for x
    x = 137,456,435,281.10/425,622.90
  6. Step 6: Final answer
    x = 322,953.57

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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.