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Finding the Fourth Proportional to 378.50, 567.74 and 147.35

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Solution

The fourth proportional to 378.50, 567.74 and 147.35 is: 221.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.50 : 567.74 = 147.35 : x
  2. Step 2: Convert to fraction form
    378.50/567.74 = 147.35/x
  3. Step 3: Cross multiply
    378.50x = 567.74 × 147.35
  4. Step 4: Simplify right side
    378.50x = 83,652.91
  5. Step 5: Solve for x
    x = 83,652.91/378.50
  6. Step 6: Final answer
    x = 221.01

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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.