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Finding the Fourth Proportional to 886.55, 1,223.51 and 493.59

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Solution

The fourth proportional to 886.55, 1,223.51 and 493.59 is: 681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.55 : 1,223.51 = 493.59 : x
  2. Step 2: Convert to fraction form
    886.55/1,223.51 = 493.59/x
  3. Step 3: Cross multiply
    886.55x = 1,223.51 × 493.59
  4. Step 4: Simplify right side
    886.55x = 603,914.42
  5. Step 5: Solve for x
    x = 603,914.42/886.55
  6. Step 6: Final answer
    x = 681.20

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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.