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Finding the Fourth Proportional to 692.40, 1,039.05 and 368.01

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Solution

The fourth proportional to 692.40, 1,039.05 and 368.01 is: 552.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.40 : 1,039.05 = 368.01 : x
  2. Step 2: Convert to fraction form
    692.40/1,039.05 = 368.01/x
  3. Step 3: Cross multiply
    692.40x = 1,039.05 × 368.01
  4. Step 4: Simplify right side
    692.40x = 382,380.79
  5. Step 5: Solve for x
    x = 382,380.79/692.40
  6. Step 6: Final answer
    x = 552.25

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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.