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Finding the Fourth Proportional to 890.93, 1,230.77 and 696.98

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Solution

The fourth proportional to 890.93, 1,230.77 and 696.98 is: 962.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.93 : 1,230.77 = 696.98 : x
  2. Step 2: Convert to fraction form
    890.93/1,230.77 = 696.98/x
  3. Step 3: Cross multiply
    890.93x = 1,230.77 × 696.98
  4. Step 4: Simplify right side
    890.93x = 857,817.66
  5. Step 5: Solve for x
    x = 857,817.66/890.93
  6. Step 6: Final answer
    x = 962.84

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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.