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Finding the Fourth Proportional to 889.71, 1,334.57 and 479.04

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Solution

The fourth proportional to 889.71, 1,334.57 and 479.04 is: 718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.71 : 1,334.57 = 479.04 : x
  2. Step 2: Convert to fraction form
    889.71/1,334.57 = 479.04/x
  3. Step 3: Cross multiply
    889.71x = 1,334.57 × 479.04
  4. Step 4: Simplify right side
    889.71x = 639,305.01
  5. Step 5: Solve for x
    x = 639,305.01/889.71
  6. Step 6: Final answer
    x = 718.56

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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.