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Finding the Fourth Proportional to 897.33, 1,238.79 and 674.50

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Solution

The fourth proportional to 897.33, 1,238.79 and 674.50 is: 931.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.33 : 1,238.79 = 674.50 : x
  2. Step 2: Convert to fraction form
    897.33/1,238.79 = 674.50/x
  3. Step 3: Cross multiply
    897.33x = 1,238.79 × 674.50
  4. Step 4: Simplify right side
    897.33x = 835,569.09
  5. Step 5: Solve for x
    x = 835,569.09/897.33
  6. Step 6: Final answer
    x = 931.17

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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.