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Finding the Fourth Proportional to 898.58, 1,242.27 and 890.38

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Solution

The fourth proportional to 898.58, 1,242.27 and 890.38 is: 1,230.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.58 : 1,242.27 = 890.38 : x
  2. Step 2: Convert to fraction form
    898.58/1,242.27 = 890.38/x
  3. Step 3: Cross multiply
    898.58x = 1,242.27 × 890.38
  4. Step 4: Simplify right side
    898.58x = 1,106,092.36
  5. Step 5: Solve for x
    x = 1,106,092.36/898.58
  6. Step 6: Final answer
    x = 1,230.93

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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.