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Finding the Fourth Proportional to 370.37, 555.75 and 139.42

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Solution

The fourth proportional to 370.37, 555.75 and 139.42 is: 209.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.37 : 555.75 = 139.42 : x
  2. Step 2: Convert to fraction form
    370.37/555.75 = 139.42/x
  3. Step 3: Cross multiply
    370.37x = 555.75 × 139.42
  4. Step 4: Simplify right side
    370.37x = 77,482.67
  5. Step 5: Solve for x
    x = 77,482.67/370.37
  6. Step 6: Final answer
    x = 209.20

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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.