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Finding the Fourth Proportional to 355.93, 531.21 and 346.70

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Solution

The fourth proportional to 355.93, 531.21 and 346.70 is: 517.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.93 : 531.21 = 346.70 : x
  2. Step 2: Convert to fraction form
    355.93/531.21 = 346.70/x
  3. Step 3: Cross multiply
    355.93x = 531.21 × 346.70
  4. Step 4: Simplify right side
    355.93x = 184,172.10
  5. Step 5: Solve for x
    x = 184,172.10/355.93
  6. Step 6: Final answer
    x = 517.44

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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.