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Finding the Fourth Proportional to 967.28, 1,451.07 and 390.14

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Solution

The fourth proportional to 967.28, 1,451.07 and 390.14 is: 585.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.28 : 1,451.07 = 390.14 : x
  2. Step 2: Convert to fraction form
    967.28/1,451.07 = 390.14/x
  3. Step 3: Cross multiply
    967.28x = 1,451.07 × 390.14
  4. Step 4: Simplify right side
    967.28x = 566,120.45
  5. Step 5: Solve for x
    x = 566,120.45/967.28
  6. Step 6: Final answer
    x = 585.27

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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.