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Finding the Fourth Proportional to 886.54, 1,223.40 and 493.55

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Solution

The fourth proportional to 886.54, 1,223.40 and 493.55 is: 681.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.54 : 1,223.40 = 493.55 : x
  2. Step 2: Convert to fraction form
    886.54/1,223.40 = 493.55/x
  3. Step 3: Cross multiply
    886.54x = 1,223.40 × 493.55
  4. Step 4: Simplify right side
    886.54x = 603,806.60
  5. Step 5: Solve for x
    x = 603,806.60/886.54
  6. Step 6: Final answer
    x = 681.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.