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Finding the Fourth Proportional to 288,065.67, 431,519.76 and 143,535.56

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Solution

The fourth proportional to 288,065.67, 431,519.76 and 143,535.56 is: 215,014.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,065.67 : 431,519.76 = 143,535.56 : x
  2. Step 2: Convert to fraction form
    288,065.67/431,519.76 = 143,535.56/x
  3. Step 3: Cross multiply
    288,065.67x = 431,519.76 × 143,535.56
  4. Step 4: Simplify right side
    288,065.67x = 61,938,428,245.07
  5. Step 5: Solve for x
    x = 61,938,428,245.07/288,065.67
  6. Step 6: Final answer
    x = 215,014.96

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1.5x scale

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.