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Finding the Fourth Proportional to 959.07, 1,320.26 and 860.79

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Solution

The fourth proportional to 959.07, 1,320.26 and 860.79 is: 1,184.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.07 : 1,320.26 = 860.79 : x
  2. Step 2: Convert to fraction form
    959.07/1,320.26 = 860.79/x
  3. Step 3: Cross multiply
    959.07x = 1,320.26 × 860.79
  4. Step 4: Simplify right side
    959.07x = 1,136,462.30
  5. Step 5: Solve for x
    x = 1,136,462.30/959.07
  6. Step 6: Final answer
    x = 1,184.96

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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.