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Finding the Fourth Proportional to 317,659.86, 438,310.44 and 215,766.72

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Solution

The fourth proportional to 317,659.86, 438,310.44 and 215,766.72 is: 297,717.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,659.86 : 438,310.44 = 215,766.72 : x
  2. Step 2: Convert to fraction form
    317,659.86/438,310.44 = 215,766.72/x
  3. Step 3: Cross multiply
    317,659.86x = 438,310.44 × 215,766.72
  4. Step 4: Simplify right side
    317,659.86x = 94,572,805,980.56
  5. Step 5: Solve for x
    x = 94,572,805,980.56/317,659.86
  6. Step 6: Final answer
    x = 297,717.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.