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Finding the Fourth Proportional to 692.04, 1,038.35 and 281.97

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Solution

The fourth proportional to 692.04, 1,038.35 and 281.97 is: 423.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.04 : 1,038.35 = 281.97 : x
  2. Step 2: Convert to fraction form
    692.04/1,038.35 = 281.97/x
  3. Step 3: Cross multiply
    692.04x = 1,038.35 × 281.97
  4. Step 4: Simplify right side
    692.04x = 292,782.14
  5. Step 5: Solve for x
    x = 292,782.14/692.04
  6. Step 6: Final answer
    x = 423.07

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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.