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Finding the Fourth Proportional to 345,313.32, 517,920.77 and 108,649.85

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Solution

The fourth proportional to 345,313.32, 517,920.77 and 108,649.85 is: 162,959.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,313.32 : 517,920.77 = 108,649.85 : x
  2. Step 2: Convert to fraction form
    345,313.32/517,920.77 = 108,649.85/x
  3. Step 3: Cross multiply
    345,313.32x = 517,920.77 × 108,649.85
  4. Step 4: Simplify right side
    345,313.32x = 56,272,013,596.61
  5. Step 5: Solve for x
    x = 56,272,013,596.61/345,313.32
  6. Step 6: Final answer
    x = 162,959.29

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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.