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Finding the Fourth Proportional to 1,380.02, 2,069.94 and 354.02

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Solution

The fourth proportional to 1,380.02, 2,069.94 and 354.02 is: 531.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.02 : 2,069.94 = 354.02 : x
  2. Step 2: Convert to fraction form
    1,380.02/2,069.94 = 354.02/x
  3. Step 3: Cross multiply
    1,380.02x = 2,069.94 × 354.02
  4. Step 4: Simplify right side
    1,380.02x = 732,800.16
  5. Step 5: Solve for x
    x = 732,800.16/1,380.02
  6. Step 6: Final answer
    x = 531.01

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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.