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Finding the Fourth Proportional to 889.17, 1,226.95 and 496.23

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Solution

The fourth proportional to 889.17, 1,226.95 and 496.23 is: 684.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.17 : 1,226.95 = 496.23 : x
  2. Step 2: Convert to fraction form
    889.17/1,226.95 = 496.23/x
  3. Step 3: Cross multiply
    889.17x = 1,226.95 × 496.23
  4. Step 4: Simplify right side
    889.17x = 608,849.40
  5. Step 5: Solve for x
    x = 608,849.40/889.17
  6. Step 6: Final answer
    x = 684.74

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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.