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Finding the Fourth Proportional to 357.54, 535.40 and 266.30

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Solution

The fourth proportional to 357.54, 535.40 and 266.30 is: 398.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.54 : 535.40 = 266.30 : x
  2. Step 2: Convert to fraction form
    357.54/535.40 = 266.30/x
  3. Step 3: Cross multiply
    357.54x = 535.40 × 266.30
  4. Step 4: Simplify right side
    357.54x = 142,577.02
  5. Step 5: Solve for x
    x = 142,577.02/357.54
  6. Step 6: Final answer
    x = 398.77

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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.