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Finding the Fourth Proportional to 285,615.30, 428,422.95 and 167,420.10

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Solution

The fourth proportional to 285,615.30, 428,422.95 and 167,420.10 is: 251,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,615.30 : 428,422.95 = 167,420.10 : x
  2. Step 2: Convert to fraction form
    285,615.30/428,422.95 = 167,420.10/x
  3. Step 3: Cross multiply
    285,615.30x = 428,422.95 × 167,420.10
  4. Step 4: Simplify right side
    285,615.30x = 71,726,613,131.30
  5. Step 5: Solve for x
    x = 71,726,613,131.30/285,615.30
  6. Step 6: Final answer
    x = 251,130.15

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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.