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Finding the Fourth Proportional to 425,445.15, 638,167.05 and 197,616.18

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Solution

The fourth proportional to 425,445.15, 638,167.05 and 197,616.18 is: 296,423.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,445.15 : 638,167.05 = 197,616.18 : x
  2. Step 2: Convert to fraction form
    425,445.15/638,167.05 = 197,616.18/x
  3. Step 3: Cross multiply
    425,445.15x = 638,167.05 × 197,616.18
  4. Step 4: Simplify right side
    425,445.15x = 126,112,134,622.87
  5. Step 5: Solve for x
    x = 126,112,134,622.87/425,445.15
  6. Step 6: Final answer
    x = 296,423.96

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1.5x scale

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.