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Finding the Fourth Proportional to 967.64, 1,451.46 and 390.38

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Solution

The fourth proportional to 967.64, 1,451.46 and 390.38 is: 585.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.64 : 1,451.46 = 390.38 : x
  2. Step 2: Convert to fraction form
    967.64/1,451.46 = 390.38/x
  3. Step 3: Cross multiply
    967.64x = 1,451.46 × 390.38
  4. Step 4: Simplify right side
    967.64x = 566,620.95
  5. Step 5: Solve for x
    x = 566,620.95/967.64
  6. Step 6: Final answer
    x = 585.57

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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.