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Finding the Fourth Proportional to 758.43, 1,141.76 and 543.51

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Solution

The fourth proportional to 758.43, 1,141.76 and 543.51 is: 818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.43 : 1,141.76 = 543.51 : x
  2. Step 2: Convert to fraction form
    758.43/1,141.76 = 543.51/x
  3. Step 3: Cross multiply
    758.43x = 1,141.76 × 543.51
  4. Step 4: Simplify right side
    758.43x = 620,555.26
  5. Step 5: Solve for x
    x = 620,555.26/758.43
  6. Step 6: Final answer
    x = 818.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.