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Finding the Fourth Proportional to 890.02, 1,226.82 and 679.51

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Solution

The fourth proportional to 890.02, 1,226.82 and 679.51 is: 936.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.02 : 1,226.82 = 679.51 : x
  2. Step 2: Convert to fraction form
    890.02/1,226.82 = 679.51/x
  3. Step 3: Cross multiply
    890.02x = 1,226.82 × 679.51
  4. Step 4: Simplify right side
    890.02x = 833,636.46
  5. Step 5: Solve for x
    x = 833,636.46/890.02
  6. Step 6: Final answer
    x = 936.65

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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.