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Finding the Fourth Proportional to 372,279.78, 513,746.55 and 202,513.50

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Solution

The fourth proportional to 372,279.78, 513,746.55 and 202,513.50 is: 279,468.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,279.78 : 513,746.55 = 202,513.50 : x
  2. Step 2: Convert to fraction form
    372,279.78/513,746.55 = 202,513.50/x
  3. Step 3: Cross multiply
    372,279.78x = 513,746.55 × 202,513.50
  4. Step 4: Simplify right side
    372,279.78x = 104,040,611,953.43
  5. Step 5: Solve for x
    x = 104,040,611,953.43/372,279.78
  6. Step 6: Final answer
    x = 279,468.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.