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Finding the Fourth Proportional to 288,791.80, 433,122.90 and 138,955.57

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Solution

The fourth proportional to 288,791.80, 433,122.90 and 138,955.57 is: 208,402.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,791.80 : 433,122.90 = 138,955.57 : x
  2. Step 2: Convert to fraction form
    288,791.80/433,122.90 = 138,955.57/x
  3. Step 3: Cross multiply
    288,791.80x = 433,122.90 × 138,955.57
  4. Step 4: Simplify right side
    288,791.80x = 60,184,839,449.55
  5. Step 5: Solve for x
    x = 60,184,839,449.55/288,791.80
  6. Step 6: Final answer
    x = 208,402.18

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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.