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Finding the Fourth Proportional to 345,864.44, 515,358.47 and 308,134.59

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Solution

The fourth proportional to 345,864.44, 515,358.47 and 308,134.59 is: 459,138.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,864.44 : 515,358.47 = 308,134.59 : x
  2. Step 2: Convert to fraction form
    345,864.44/515,358.47 = 308,134.59/x
  3. Step 3: Cross multiply
    345,864.44x = 515,358.47 × 308,134.59
  4. Step 4: Simplify right side
    345,864.44x = 158,799,769,315.80
  5. Step 5: Solve for x
    x = 158,799,769,315.80/345,864.44
  6. Step 6: Final answer
    x = 459,138.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.