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Finding the Fourth Proportional to 886.30, 1,328.98 and 447.08

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Solution

The fourth proportional to 886.30, 1,328.98 and 447.08 is: 670.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.30 : 1,328.98 = 447.08 : x
  2. Step 2: Convert to fraction form
    886.30/1,328.98 = 447.08/x
  3. Step 3: Cross multiply
    886.30x = 1,328.98 × 447.08
  4. Step 4: Simplify right side
    886.30x = 594,160.38
  5. Step 5: Solve for x
    x = 594,160.38/886.30
  6. Step 6: Final answer
    x = 670.38

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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.