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Finding the Fourth Proportional to 343,587.92, 515,583.57 and 143,892.95

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Solution

The fourth proportional to 343,587.92, 515,583.57 and 143,892.95 is: 215,923.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,587.92 : 515,583.57 = 143,892.95 : x
  2. Step 2: Convert to fraction form
    343,587.92/515,583.57 = 143,892.95/x
  3. Step 3: Cross multiply
    343,587.92x = 515,583.57 × 143,892.95
  4. Step 4: Simplify right side
    343,587.92x = 74,188,840,858.83
  5. Step 5: Solve for x
    x = 74,188,840,858.83/343,587.92
  6. Step 6: Final answer
    x = 215,923.89

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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.