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Finding the Fourth Proportional to 425,920.55, 638,805.89 and 155,992.91

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Solution

The fourth proportional to 425,920.55, 638,805.89 and 155,992.91 is: 233,961.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,920.55 : 638,805.89 = 155,992.91 : x
  2. Step 2: Convert to fraction form
    425,920.55/638,805.89 = 155,992.91/x
  3. Step 3: Cross multiply
    425,920.55x = 638,805.89 × 155,992.91
  4. Step 4: Simplify right side
    425,920.55x = 99,649,186,902.19
  5. Step 5: Solve for x
    x = 99,649,186,902.19/425,920.55
  6. Step 6: Final answer
    x = 233,961.92

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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.