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Finding the Fourth Proportional to 619,387.48, 929,079.48 and 170,108.78

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Solution

The fourth proportional to 619,387.48, 929,079.48 and 170,108.78 is: 255,162.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,387.48 : 929,079.48 = 170,108.78 : x
  2. Step 2: Convert to fraction form
    619,387.48/929,079.48 = 170,108.78/x
  3. Step 3: Cross multiply
    619,387.48x = 929,079.48 × 170,108.78
  4. Step 4: Simplify right side
    619,387.48x = 158,044,576,865.83
  5. Step 5: Solve for x
    x = 158,044,576,865.83/619,387.48
  6. Step 6: Final answer
    x = 255,162.69

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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.