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Finding the Fourth Proportional to 889.29, 1,335.20 and 479.88

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Solution

The fourth proportional to 889.29, 1,335.20 and 479.88 is: 720.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.29 : 1,335.20 = 479.88 : x
  2. Step 2: Convert to fraction form
    889.29/1,335.20 = 479.88/x
  3. Step 3: Cross multiply
    889.29x = 1,335.20 × 479.88
  4. Step 4: Simplify right side
    889.29x = 640,733.38
  5. Step 5: Solve for x
    x = 640,733.38/889.29
  6. Step 6: Final answer
    x = 720.50

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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.