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Finding the Fourth Proportional to 1,472.81, 2,208.47 and 692.55

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Solution

The fourth proportional to 1,472.81, 2,208.47 and 692.55 is: 1,038.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,472.81 : 2,208.47 = 692.55 : x
  2. Step 2: Convert to fraction form
    1,472.81/2,208.47 = 692.55/x
  3. Step 3: Cross multiply
    1,472.81x = 2,208.47 × 692.55
  4. Step 4: Simplify right side
    1,472.81x = 1,529,472.44
  5. Step 5: Solve for x
    x = 1,529,472.44/1,472.81
  6. Step 6: Final answer
    x = 1,038.48

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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.