Home / 290,867.28-435,853.80-172,302.72

Finding the Fourth Proportional to 290,867.28, 435,853.80 and 172,302.72

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Solution

The fourth proportional to 290,867.28, 435,853.80 and 172,302.72 is: 258,189.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,867.28 : 435,853.80 = 172,302.72 : x
  2. Step 2: Convert to fraction form
    290,867.28/435,853.80 = 172,302.72/x
  3. Step 3: Cross multiply
    290,867.28x = 435,853.80 × 172,302.72
  4. Step 4: Simplify right side
    290,867.28x = 75,098,795,262.34
  5. Step 5: Solve for x
    x = 75,098,795,262.34/290,867.28
  6. Step 6: Final answer
    x = 258,189.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.