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Finding the Fourth Proportional to 1,424.80, 2,133.80 and 692.02

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Solution

The fourth proportional to 1,424.80, 2,133.80 and 692.02 is: 1,036.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.80 : 2,133.80 = 692.02 : x
  2. Step 2: Convert to fraction form
    1,424.80/2,133.80 = 692.02/x
  3. Step 3: Cross multiply
    1,424.80x = 2,133.80 × 692.02
  4. Step 4: Simplify right side
    1,424.80x = 1,476,632.28
  5. Step 5: Solve for x
    x = 1,476,632.28/1,424.80
  6. Step 6: Final answer
    x = 1,036.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.