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Finding the Fourth Proportional to 886.73, 1,223.66 and 493.71

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Solution

The fourth proportional to 886.73, 1,223.66 and 493.71 is: 681.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.73 : 1,223.66 = 493.71 : x
  2. Step 2: Convert to fraction form
    886.73/1,223.66 = 493.71/x
  3. Step 3: Cross multiply
    886.73x = 1,223.66 × 493.71
  4. Step 4: Simplify right side
    886.73x = 604,130.71
  5. Step 5: Solve for x
    x = 604,130.71/886.73
  6. Step 6: Final answer
    x = 681.31

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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.