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Finding the Fourth Proportional to 988.02, 1,353.57 and 951.09

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Solution

The fourth proportional to 988.02, 1,353.57 and 951.09 is: 1,302.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.02 : 1,353.57 = 951.09 : x
  2. Step 2: Convert to fraction form
    988.02/1,353.57 = 951.09/x
  3. Step 3: Cross multiply
    988.02x = 1,353.57 × 951.09
  4. Step 4: Simplify right side
    988.02x = 1,287,366.89
  5. Step 5: Solve for x
    x = 1,287,366.89/988.02
  6. Step 6: Final answer
    x = 1,302.98

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.