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Finding the Fourth Proportional to 886.66, 1,329.99 and 423.03

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Solution

The fourth proportional to 886.66, 1,329.99 and 423.03 is: 634.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.66 : 1,329.99 = 423.03 : x
  2. Step 2: Convert to fraction form
    886.66/1,329.99 = 423.03/x
  3. Step 3: Cross multiply
    886.66x = 1,329.99 × 423.03
  4. Step 4: Simplify right side
    886.66x = 562,625.67
  5. Step 5: Solve for x
    x = 562,625.67/886.66
  6. Step 6: Final answer
    x = 634.55

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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.