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Finding the Fourth Proportional to 967.85, 1,336.17 and 874.28

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Solution

The fourth proportional to 967.85, 1,336.17 and 874.28 is: 1,206.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.85 : 1,336.17 = 874.28 : x
  2. Step 2: Convert to fraction form
    967.85/1,336.17 = 874.28/x
  3. Step 3: Cross multiply
    967.85x = 1,336.17 × 874.28
  4. Step 4: Simplify right side
    967.85x = 1,168,186.71
  5. Step 5: Solve for x
    x = 1,168,186.71/967.85
  6. Step 6: Final answer
    x = 1,206.99

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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.