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Finding the Fourth Proportional to 310,464.48, 428,435.88 and 172,637.92

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Solution

The fourth proportional to 310,464.48, 428,435.88 and 172,637.92 is: 238,237.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,464.48 : 428,435.88 = 172,637.92 : x
  2. Step 2: Convert to fraction form
    310,464.48/428,435.88 = 172,637.92/x
  3. Step 3: Cross multiply
    310,464.48x = 428,435.88 × 172,637.92
  4. Step 4: Simplify right side
    310,464.48x = 73,964,279,176.57
  5. Step 5: Solve for x
    x = 73,964,279,176.57/310,464.48
  6. Step 6: Final answer
    x = 238,237.49

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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.