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Finding the Fourth Proportional to 380.02, 569.90 and 136.48

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Solution

The fourth proportional to 380.02, 569.90 and 136.48 is: 204.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.02 : 569.90 = 136.48 : x
  2. Step 2: Convert to fraction form
    380.02/569.90 = 136.48/x
  3. Step 3: Cross multiply
    380.02x = 569.90 × 136.48
  4. Step 4: Simplify right side
    380.02x = 77,779.95
  5. Step 5: Solve for x
    x = 77,779.95/380.02
  6. Step 6: Final answer
    x = 204.67

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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.