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Finding the Fourth Proportional to 343,909.96, 515,787.72 and 144,455.56

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Solution

The fourth proportional to 343,909.96, 515,787.72 and 144,455.56 is: 216,650.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,909.96 : 515,787.72 = 144,455.56 : x
  2. Step 2: Convert to fraction form
    343,909.96/515,787.72 = 144,455.56/x
  3. Step 3: Cross multiply
    343,909.96x = 515,787.72 × 144,455.56
  4. Step 4: Simplify right side
    343,909.96x = 74,508,403,933.72
  5. Step 5: Solve for x
    x = 74,508,403,933.72/343,909.96
  6. Step 6: Final answer
    x = 216,650.90

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1.5x scale

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.