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Finding the Fourth Proportional to 343,356.89, 515,263.86 and 141,118.85

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Solution

The fourth proportional to 343,356.89, 515,263.86 and 141,118.85 is: 211,772.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,356.89 : 515,263.86 = 141,118.85 : x
  2. Step 2: Convert to fraction form
    343,356.89/515,263.86 = 141,118.85/x
  3. Step 3: Cross multiply
    343,356.89x = 515,263.86 × 141,118.85
  4. Step 4: Simplify right side
    343,356.89x = 72,713,443,369.76
  5. Step 5: Solve for x
    x = 72,713,443,369.76/343,356.89
  6. Step 6: Final answer
    x = 211,772.20

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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.