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Finding the Fourth Proportional to 1,167.51, 1,749.90 and 959.76

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Solution

The fourth proportional to 1,167.51, 1,749.90 and 959.76 is: 1,438.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.51 : 1,749.90 = 959.76 : x
  2. Step 2: Convert to fraction form
    1,167.51/1,749.90 = 959.76/x
  3. Step 3: Cross multiply
    1,167.51x = 1,749.90 × 959.76
  4. Step 4: Simplify right side
    1,167.51x = 1,679,484.02
  5. Step 5: Solve for x
    x = 1,679,484.02/1,167.51
  6. Step 6: Final answer
    x = 1,438.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.