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Finding the Fourth Proportional to 886.74, 1,330.10 and 612

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Solution

The fourth proportional to 886.74, 1,330.10 and 612 is: 917.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.74 : 1,330.10 = 612 : x
  2. Step 2: Convert to fraction form
    886.74/1,330.10 = 612/x
  3. Step 3: Cross multiply
    886.74x = 1,330.10 × 612
  4. Step 4: Simplify right side
    886.74x = 814,021.20
  5. Step 5: Solve for x
    x = 814,021.20/886.74
  6. Step 6: Final answer
    x = 917.99

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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.