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Finding the Fourth Proportional to 876.63, 1,208.44 and 581.39

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Solution

The fourth proportional to 876.63, 1,208.44 and 581.39 is: 801.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.63 : 1,208.44 = 581.39 : x
  2. Step 2: Convert to fraction form
    876.63/1,208.44 = 581.39/x
  3. Step 3: Cross multiply
    876.63x = 1,208.44 × 581.39
  4. Step 4: Simplify right side
    876.63x = 702,574.93
  5. Step 5: Solve for x
    x = 702,574.93/876.63
  6. Step 6: Final answer
    x = 801.45

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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.