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Finding the Fourth Proportional to 370.78, 557.70 and 352.30

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Solution

The fourth proportional to 370.78, 557.70 and 352.30 is: 529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.78 : 557.70 = 352.30 : x
  2. Step 2: Convert to fraction form
    370.78/557.70 = 352.30/x
  3. Step 3: Cross multiply
    370.78x = 557.70 × 352.30
  4. Step 4: Simplify right side
    370.78x = 196,477.71
  5. Step 5: Solve for x
    x = 196,477.71/370.78
  6. Step 6: Final answer
    x = 529.90

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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.