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Finding the Fourth Proportional to 1,216.91, 1,679.33 and 692.93

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Solution

The fourth proportional to 1,216.91, 1,679.33 and 692.93 is: 956.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.91 : 1,679.33 = 692.93 : x
  2. Step 2: Convert to fraction form
    1,216.91/1,679.33 = 692.93/x
  3. Step 3: Cross multiply
    1,216.91x = 1,679.33 × 692.93
  4. Step 4: Simplify right side
    1,216.91x = 1,163,664.07
  5. Step 5: Solve for x
    x = 1,163,664.07/1,216.91
  6. Step 6: Final answer
    x = 956.25

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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.