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Finding the Fourth Proportional to 638,766.12, 958,236.66 and 217,929

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Solution

The fourth proportional to 638,766.12, 958,236.66 and 217,929 is: 326,923.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,766.12 : 958,236.66 = 217,929 : x
  2. Step 2: Convert to fraction form
    638,766.12/958,236.66 = 217,929/x
  3. Step 3: Cross multiply
    638,766.12x = 958,236.66 × 217,929
  4. Step 4: Simplify right side
    638,766.12x = 208,827,557,077.14
  5. Step 5: Solve for x
    x = 208,827,557,077.14/638,766.12
  6. Step 6: Final answer
    x = 326,923.35

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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.