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Finding the Fourth Proportional to 425,434.48, 638,545.44 and 215,220.04

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Solution

The fourth proportional to 425,434.48, 638,545.44 and 215,220.04 is: 323,029.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,434.48 : 638,545.44 = 215,220.04 : x
  2. Step 2: Convert to fraction form
    425,434.48/638,545.44 = 215,220.04/x
  3. Step 3: Cross multiply
    425,434.48x = 638,545.44 × 215,220.04
  4. Step 4: Simplify right side
    425,434.48x = 137,427,775,138.62
  5. Step 5: Solve for x
    x = 137,427,775,138.62/425,434.48
  6. Step 6: Final answer
    x = 323,029.24

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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.