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Finding the Fourth Proportional to 968.80, 1,456.50 and 964

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Solution

The fourth proportional to 968.80, 1,456.50 and 964 is: 1,449.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.80 : 1,456.50 = 964 : x
  2. Step 2: Convert to fraction form
    968.80/1,456.50 = 964/x
  3. Step 3: Cross multiply
    968.80x = 1,456.50 × 964
  4. Step 4: Simplify right side
    968.80x = 1,404,066
  5. Step 5: Solve for x
    x = 1,404,066/968.80
  6. Step 6: Final answer
    x = 1,449.28

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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.