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Finding the Fourth Proportional to 387,864.36, 535,562.82 and 251,965.80

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Solution

The fourth proportional to 387,864.36, 535,562.82 and 251,965.80 is: 347,914.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,864.36 : 535,562.82 = 251,965.80 : x
  2. Step 2: Convert to fraction form
    387,864.36/535,562.82 = 251,965.80/x
  3. Step 3: Cross multiply
    387,864.36x = 535,562.82 × 251,965.80
  4. Step 4: Simplify right side
    387,864.36x = 134,943,514,391.56
  5. Step 5: Solve for x
    x = 134,943,514,391.56/387,864.36
  6. Step 6: Final answer
    x = 347,914.19

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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.