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Finding the Fourth Proportional to 1,605.98, 2,216.30 and 897.90

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Solution

The fourth proportional to 1,605.98, 2,216.30 and 897.90 is: 1,239.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.98 : 2,216.30 = 897.90 : x
  2. Step 2: Convert to fraction form
    1,605.98/2,216.30 = 897.90/x
  3. Step 3: Cross multiply
    1,605.98x = 2,216.30 × 897.90
  4. Step 4: Simplify right side
    1,605.98x = 1,990,011.28
  5. Step 5: Solve for x
    x = 1,990,011.28/1,605.98
  6. Step 6: Final answer
    x = 1,239.13

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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.