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Finding the Fourth Proportional to 1,213.93, 1,820.67 and 433.90

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Solution

The fourth proportional to 1,213.93, 1,820.67 and 433.90 is: 650.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.93 : 1,820.67 = 433.90 : x
  2. Step 2: Convert to fraction form
    1,213.93/1,820.67 = 433.90/x
  3. Step 3: Cross multiply
    1,213.93x = 1,820.67 × 433.90
  4. Step 4: Simplify right side
    1,213.93x = 789,988.71
  5. Step 5: Solve for x
    x = 789,988.71/1,213.93
  6. Step 6: Final answer
    x = 650.77

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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.