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Finding the Fourth Proportional to 355.93, 531.35 and 330.55

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Solution

The fourth proportional to 355.93, 531.35 and 330.55 is: 493.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.93 : 531.35 = 330.55 : x
  2. Step 2: Convert to fraction form
    355.93/531.35 = 330.55/x
  3. Step 3: Cross multiply
    355.93x = 531.35 × 330.55
  4. Step 4: Simplify right side
    355.93x = 175,637.74
  5. Step 5: Solve for x
    x = 175,637.74/355.93
  6. Step 6: Final answer
    x = 493.46

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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.