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Finding the Fourth Proportional to 318,396.72, 439,085.91 and 203,711.66

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Solution

The fourth proportional to 318,396.72, 439,085.91 and 203,711.66 is: 280,929.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,396.72 : 439,085.91 = 203,711.66 : x
  2. Step 2: Convert to fraction form
    318,396.72/439,085.91 = 203,711.66/x
  3. Step 3: Cross multiply
    318,396.72x = 439,085.91 × 203,711.66
  4. Step 4: Simplify right side
    318,396.72x = 89,446,919,608.71
  5. Step 5: Solve for x
    x = 89,446,919,608.71/318,396.72
  6. Step 6: Final answer
    x = 280,929.15

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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.