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Finding the Fourth Proportional to 875.55, 1,208.67 and 544.20

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Solution

The fourth proportional to 875.55, 1,208.67 and 544.20 is: 751.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.55 : 1,208.67 = 544.20 : x
  2. Step 2: Convert to fraction form
    875.55/1,208.67 = 544.20/x
  3. Step 3: Cross multiply
    875.55x = 1,208.67 × 544.20
  4. Step 4: Simplify right side
    875.55x = 657,758.21
  5. Step 5: Solve for x
    x = 657,758.21/875.55
  6. Step 6: Final answer
    x = 751.25

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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.