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Finding the Fourth Proportional to 387,953.15, 535,375.71 and 215,886.87

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Solution

The fourth proportional to 387,953.15, 535,375.71 and 215,886.87 is: 297,924.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,953.15 : 535,375.71 = 215,886.87 : x
  2. Step 2: Convert to fraction form
    387,953.15/535,375.71 = 215,886.87/x
  3. Step 3: Cross multiply
    387,953.15x = 535,375.71 × 215,886.87
  4. Step 4: Simplify right side
    387,953.15x = 115,580,586,305.93
  5. Step 5: Solve for x
    x = 115,580,586,305.93/387,953.15
  6. Step 6: Final answer
    x = 297,924.09

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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.