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Finding the Fourth Proportional to 288,393.11, 431,737.72 and 213,012.71

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Solution

The fourth proportional to 288,393.11, 431,737.72 and 213,012.71 is: 318,889.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,393.11 : 431,737.72 = 213,012.71 : x
  2. Step 2: Convert to fraction form
    288,393.11/431,737.72 = 213,012.71/x
  3. Step 3: Cross multiply
    288,393.11x = 431,737.72 × 213,012.71
  4. Step 4: Simplify right side
    288,393.11x = 91,965,621,746.42
  5. Step 5: Solve for x
    x = 91,965,621,746.42/288,393.11
  6. Step 6: Final answer
    x = 318,889.80

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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.