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Finding the Fourth Proportional to 315,268.63, 435,067.09 and 172,031.06

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Solution

The fourth proportional to 315,268.63, 435,067.09 and 172,031.06 is: 237,400.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,268.63 : 435,067.09 = 172,031.06 : x
  2. Step 2: Convert to fraction form
    315,268.63/435,067.09 = 172,031.06/x
  3. Step 3: Cross multiply
    315,268.63x = 435,067.09 × 172,031.06
  4. Step 4: Simplify right side
    315,268.63x = 74,845,053,321.41
  5. Step 5: Solve for x
    x = 74,845,053,321.41/315,268.63
  6. Step 6: Final answer
    x = 237,400.89

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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.