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Finding the Fourth Proportional to 968.21, 1,449.84 and 479.98

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Solution

The fourth proportional to 968.21, 1,449.84 and 479.98 is: 718.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.21 : 1,449.84 = 479.98 : x
  2. Step 2: Convert to fraction form
    968.21/1,449.84 = 479.98/x
  3. Step 3: Cross multiply
    968.21x = 1,449.84 × 479.98
  4. Step 4: Simplify right side
    968.21x = 695,894.20
  5. Step 5: Solve for x
    x = 695,894.20/968.21
  6. Step 6: Final answer
    x = 718.74

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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.