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Finding the Fourth Proportional to 318,118.72, 439,012.23 and 172,934.27

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Solution

The fourth proportional to 318,118.72, 439,012.23 and 172,934.27 is: 238,653.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,118.72 : 439,012.23 = 172,934.27 : x
  2. Step 2: Convert to fraction form
    318,118.72/439,012.23 = 172,934.27/x
  3. Step 3: Cross multiply
    318,118.72x = 439,012.23 × 172,934.27
  4. Step 4: Simplify right side
    318,118.72x = 75,920,259,516.12
  5. Step 5: Solve for x
    x = 75,920,259,516.12/318,118.72
  6. Step 6: Final answer
    x = 238,653.86

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1.5x scale

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.