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Finding the Fourth Proportional to 356.88, 535.11 and 148.40

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Solution

The fourth proportional to 356.88, 535.11 and 148.40 is: 222.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.88 : 535.11 = 148.40 : x
  2. Step 2: Convert to fraction form
    356.88/535.11 = 148.40/x
  3. Step 3: Cross multiply
    356.88x = 535.11 × 148.40
  4. Step 4: Simplify right side
    356.88x = 79,410.32
  5. Step 5: Solve for x
    x = 79,410.32/356.88
  6. Step 6: Final answer
    x = 222.52

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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.