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Finding the Fourth Proportional to 343,346.70, 515,020.05 and 312,933.90

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Solution

The fourth proportional to 343,346.70, 515,020.05 and 312,933.90 is: 469,400.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,346.70 : 515,020.05 = 312,933.90 : x
  2. Step 2: Convert to fraction form
    343,346.70/515,020.05 = 312,933.90/x
  3. Step 3: Cross multiply
    343,346.70x = 515,020.05 × 312,933.90
  4. Step 4: Simplify right side
    343,346.70x = 161,167,232,824.70
  5. Step 5: Solve for x
    x = 161,167,232,824.70/343,346.70
  6. Step 6: Final answer
    x = 469,400.85

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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.