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Finding the Fourth Proportional to 897.86, 1,239.51 and 677.33

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Solution

The fourth proportional to 897.86, 1,239.51 and 677.33 is: 935.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.86 : 1,239.51 = 677.33 : x
  2. Step 2: Convert to fraction form
    897.86/1,239.51 = 677.33/x
  3. Step 3: Cross multiply
    897.86x = 1,239.51 × 677.33
  4. Step 4: Simplify right side
    897.86x = 839,562.95
  5. Step 5: Solve for x
    x = 839,562.95/897.86
  6. Step 6: Final answer
    x = 935.08

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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.