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Finding the Fourth Proportional to 310,208.58, 428,078.50 and 172,387.04

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Solution

The fourth proportional to 310,208.58, 428,078.50 and 172,387.04 is: 237,888.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,208.58 : 428,078.50 = 172,387.04 : x
  2. Step 2: Convert to fraction form
    310,208.58/428,078.50 = 172,387.04/x
  3. Step 3: Cross multiply
    310,208.58x = 428,078.50 × 172,387.04
  4. Step 4: Simplify right side
    310,208.58x = 73,795,185,502.64
  5. Step 5: Solve for x
    x = 73,795,185,502.64/310,208.58
  6. Step 6: Final answer
    x = 237,888.92

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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.