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Finding the Fourth Proportional to 897.48, 1,238.10 and 767.88

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Solution

The fourth proportional to 897.48, 1,238.10 and 767.88 is: 1,059.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.48 : 1,238.10 = 767.88 : x
  2. Step 2: Convert to fraction form
    897.48/1,238.10 = 767.88/x
  3. Step 3: Cross multiply
    897.48x = 1,238.10 × 767.88
  4. Step 4: Simplify right side
    897.48x = 950,712.23
  5. Step 5: Solve for x
    x = 950,712.23/897.48
  6. Step 6: Final answer
    x = 1,059.31

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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.