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Finding the Fourth Proportional to 425,965.72, 638,708.80 and 141,504

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Solution

The fourth proportional to 425,965.72, 638,708.80 and 141,504 is: 212,176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,965.72 : 638,708.80 = 141,504 : x
  2. Step 2: Convert to fraction form
    425,965.72/638,708.80 = 141,504/x
  3. Step 3: Cross multiply
    425,965.72x = 638,708.80 × 141,504
  4. Step 4: Simplify right side
    425,965.72x = 90,379,850,035.20
  5. Step 5: Solve for x
    x = 90,379,850,035.20/425,965.72
  6. Step 6: Final answer
    x = 212,176.35

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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.