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Finding the Fourth Proportional to 312,537.42, 431,226.99 and 185,190.84

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Solution

The fourth proportional to 312,537.42, 431,226.99 and 185,190.84 is: 255,519.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,537.42 : 431,226.99 = 185,190.84 : x
  2. Step 2: Convert to fraction form
    312,537.42/431,226.99 = 185,190.84/x
  3. Step 3: Cross multiply
    312,537.42x = 431,226.99 × 185,190.84
  4. Step 4: Simplify right side
    312,537.42x = 79,859,288,508.77
  5. Step 5: Solve for x
    x = 79,859,288,508.77/312,537.42
  6. Step 6: Final answer
    x = 255,519.13

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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.