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Finding the Fourth Proportional to 357.40, 533.88 and 355.72

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Solution

The fourth proportional to 357.40, 533.88 and 355.72 is: 531.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.40 : 533.88 = 355.72 : x
  2. Step 2: Convert to fraction form
    357.40/533.88 = 355.72/x
  3. Step 3: Cross multiply
    357.40x = 533.88 × 355.72
  4. Step 4: Simplify right side
    357.40x = 189,911.79
  5. Step 5: Solve for x
    x = 189,911.79/357.40
  6. Step 6: Final answer
    x = 531.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.