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Finding the Fourth Proportional to 886.95, 1,328.49 and 611.82

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Solution

The fourth proportional to 886.95, 1,328.49 and 611.82 is: 916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.95 : 1,328.49 = 611.82 : x
  2. Step 2: Convert to fraction form
    886.95/1,328.49 = 611.82/x
  3. Step 3: Cross multiply
    886.95x = 1,328.49 × 611.82
  4. Step 4: Simplify right side
    886.95x = 812,796.75
  5. Step 5: Solve for x
    x = 812,796.75/886.95
  6. Step 6: Final answer
    x = 916.40

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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.