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Finding the Fourth Proportional to 472,421.43, 708,486.62 and 135,371.61

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Solution

The fourth proportional to 472,421.43, 708,486.62 and 135,371.61 is: 203,015.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,421.43 : 708,486.62 = 135,371.61 : x
  2. Step 2: Convert to fraction form
    472,421.43/708,486.62 = 135,371.61/x
  3. Step 3: Cross multiply
    472,421.43x = 708,486.62 × 135,371.61
  4. Step 4: Simplify right side
    472,421.43x = 95,908,973,736.00
  5. Step 5: Solve for x
    x = 95,908,973,736.00/472,421.43
  6. Step 6: Final answer
    x = 203,015.71

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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.