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Finding the Fourth Proportional to 885.95, 1,328.92 and 669.68

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Solution

The fourth proportional to 885.95, 1,328.92 and 669.68 is: 1,004.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.95 : 1,328.92 = 669.68 : x
  2. Step 2: Convert to fraction form
    885.95/1,328.92 = 669.68/x
  3. Step 3: Cross multiply
    885.95x = 1,328.92 × 669.68
  4. Step 4: Simplify right side
    885.95x = 889,942.83
  5. Step 5: Solve for x
    x = 889,942.83/885.95
  6. Step 6: Final answer
    x = 1,004.51

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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.