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Finding the Fourth Proportional to 453,201.72, 679,190.20 and 172,565.88

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Solution

The fourth proportional to 453,201.72, 679,190.20 and 172,565.88 is: 258,615.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,201.72 : 679,190.20 = 172,565.88 : x
  2. Step 2: Convert to fraction form
    453,201.72/679,190.20 = 172,565.88/x
  3. Step 3: Cross multiply
    453,201.72x = 679,190.20 × 172,565.88
  4. Step 4: Simplify right side
    453,201.72x = 117,205,051,572.00
  5. Step 5: Solve for x
    x = 117,205,051,572.00/453,201.72
  6. Step 6: Final answer
    x = 258,615.64

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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.