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Finding the Fourth Proportional to 949.49, 1,310.31 and 529.88

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Solution

The fourth proportional to 949.49, 1,310.31 and 529.88 is: 731.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.49 : 1,310.31 = 529.88 : x
  2. Step 2: Convert to fraction form
    949.49/1,310.31 = 529.88/x
  3. Step 3: Cross multiply
    949.49x = 1,310.31 × 529.88
  4. Step 4: Simplify right side
    949.49x = 694,300.51
  5. Step 5: Solve for x
    x = 694,300.51/949.49
  6. Step 6: Final answer
    x = 731.24

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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.