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Finding the Fourth Proportional to 740.87, 1,111.67 and 302.43

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Solution

The fourth proportional to 740.87, 1,111.67 and 302.43 is: 453.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.87 : 1,111.67 = 302.43 : x
  2. Step 2: Convert to fraction form
    740.87/1,111.67 = 302.43/x
  3. Step 3: Cross multiply
    740.87x = 1,111.67 × 302.43
  4. Step 4: Simplify right side
    740.87x = 336,207.85
  5. Step 5: Solve for x
    x = 336,207.85/740.87
  6. Step 6: Final answer
    x = 453.80

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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.