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Finding the Fourth Proportional to 692.53, 1,038.66 and 230.23

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Solution

The fourth proportional to 692.53, 1,038.66 and 230.23 is: 345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.53 : 1,038.66 = 230.23 : x
  2. Step 2: Convert to fraction form
    692.53/1,038.66 = 230.23/x
  3. Step 3: Cross multiply
    692.53x = 1,038.66 × 230.23
  4. Step 4: Simplify right side
    692.53x = 239,130.69
  5. Step 5: Solve for x
    x = 239,130.69/692.53
  6. Step 6: Final answer
    x = 345.30

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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.