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Finding the Fourth Proportional to 294.02, 440.65 and 139.71

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Solution

The fourth proportional to 294.02, 440.65 and 139.71 is: 209.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.02 : 440.65 = 139.71 : x
  2. Step 2: Convert to fraction form
    294.02/440.65 = 139.71/x
  3. Step 3: Cross multiply
    294.02x = 440.65 × 139.71
  4. Step 4: Simplify right side
    294.02x = 61,563.21
  5. Step 5: Solve for x
    x = 61,563.21/294.02
  6. Step 6: Final answer
    x = 209.38

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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.