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Finding the Fourth Proportional to 949.83, 1,310.81 and 530.21

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Solution

The fourth proportional to 949.83, 1,310.81 and 530.21 is: 731.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.83 : 1,310.81 = 530.21 : x
  2. Step 2: Convert to fraction form
    949.83/1,310.81 = 530.21/x
  3. Step 3: Cross multiply
    949.83x = 1,310.81 × 530.21
  4. Step 4: Simplify right side
    949.83x = 694,995.37
  5. Step 5: Solve for x
    x = 694,995.37/949.83
  6. Step 6: Final answer
    x = 731.71

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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.