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Finding the Fourth Proportional to 889.66, 1,334.54 and 479.09

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Solution

The fourth proportional to 889.66, 1,334.54 and 479.09 is: 718.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.66 : 1,334.54 = 479.09 : x
  2. Step 2: Convert to fraction form
    889.66/1,334.54 = 479.09/x
  3. Step 3: Cross multiply
    889.66x = 1,334.54 × 479.09
  4. Step 4: Simplify right side
    889.66x = 639,364.77
  5. Step 5: Solve for x
    x = 639,364.77/889.66
  6. Step 6: Final answer
    x = 718.66

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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.