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Finding the Fourth Proportional to 890.33, 1,228.42 and 497.35

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Solution

The fourth proportional to 890.33, 1,228.42 and 497.35 is: 686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.33 : 1,228.42 = 497.35 : x
  2. Step 2: Convert to fraction form
    890.33/1,228.42 = 497.35/x
  3. Step 3: Cross multiply
    890.33x = 1,228.42 × 497.35
  4. Step 4: Simplify right side
    890.33x = 610,950.37
  5. Step 5: Solve for x
    x = 610,950.37/890.33
  6. Step 6: Final answer
    x = 686.20

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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.