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Finding the Fourth Proportional to 887.72, 1,331.62 and 340.56

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Solution

The fourth proportional to 887.72, 1,331.62 and 340.56 is: 510.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.72 : 1,331.62 = 340.56 : x
  2. Step 2: Convert to fraction form
    887.72/1,331.62 = 340.56/x
  3. Step 3: Cross multiply
    887.72x = 1,331.62 × 340.56
  4. Step 4: Simplify right side
    887.72x = 453,495.66
  5. Step 5: Solve for x
    x = 453,495.66/887.72
  6. Step 6: Final answer
    x = 510.86

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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.