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Finding the Fourth Proportional to 875.13, 1,207.44 and 543.57

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Solution

The fourth proportional to 875.13, 1,207.44 and 543.57 is: 749.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.13 : 1,207.44 = 543.57 : x
  2. Step 2: Convert to fraction form
    875.13/1,207.44 = 543.57/x
  3. Step 3: Cross multiply
    875.13x = 1,207.44 × 543.57
  4. Step 4: Simplify right side
    875.13x = 656,328.16
  5. Step 5: Solve for x
    x = 656,328.16/875.13
  6. Step 6: Final answer
    x = 749.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.