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Finding the Fourth Proportional to 886.06, 1,222.80 and 493.18

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Solution

The fourth proportional to 886.06, 1,222.80 and 493.18 is: 680.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.06 : 1,222.80 = 493.18 : x
  2. Step 2: Convert to fraction form
    886.06/1,222.80 = 493.18/x
  3. Step 3: Cross multiply
    886.06x = 1,222.80 × 493.18
  4. Step 4: Simplify right side
    886.06x = 603,060.50
  5. Step 5: Solve for x
    x = 603,060.50/886.06
  6. Step 6: Final answer
    x = 680.61

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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.