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Finding the Fourth Proportional to 968, 1,451.52 and 390.72

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Solution

The fourth proportional to 968, 1,451.52 and 390.72 is: 585.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    968 : 1,451.52 = 390.72 : x
  2. Step 2: Convert to fraction form
    968/1,451.52 = 390.72/x
  3. Step 3: Cross multiply
    968x = 1,451.52 × 390.72
  4. Step 4: Simplify right side
    968x = 567,137.89
  5. Step 5: Solve for x
    x = 567,137.89/968
  6. Step 6: Final answer
    x = 585.89

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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.