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Finding the Fourth Proportional to 885.45, 1,326.87 and 555.60

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Solution

The fourth proportional to 885.45, 1,326.87 and 555.60 is: 832.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.45 : 1,326.87 = 555.60 : x
  2. Step 2: Convert to fraction form
    885.45/1,326.87 = 555.60/x
  3. Step 3: Cross multiply
    885.45x = 1,326.87 × 555.60
  4. Step 4: Simplify right side
    885.45x = 737,213.91
  5. Step 5: Solve for x
    x = 737,213.91/885.45
  6. Step 6: Final answer
    x = 832.59

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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.