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Finding the Fourth Proportional to 463.99, 696.08 and 139.39

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Solution

The fourth proportional to 463.99, 696.08 and 139.39 is: 209.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.99 : 696.08 = 139.39 : x
  2. Step 2: Convert to fraction form
    463.99/696.08 = 139.39/x
  3. Step 3: Cross multiply
    463.99x = 696.08 × 139.39
  4. Step 4: Simplify right side
    463.99x = 97,026.59
  5. Step 5: Solve for x
    x = 97,026.59/463.99
  6. Step 6: Final answer
    x = 209.11

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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.