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Finding the Fourth Proportional to 349.47, 524.21 and 89.47

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Solution

The fourth proportional to 349.47, 524.21 and 89.47 is: 134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.47 : 524.21 = 89.47 : x
  2. Step 2: Convert to fraction form
    349.47/524.21 = 89.47/x
  3. Step 3: Cross multiply
    349.47x = 524.21 × 89.47
  4. Step 4: Simplify right side
    349.47x = 46,901.28
  5. Step 5: Solve for x
    x = 46,901.28/349.47
  6. Step 6: Final answer
    x = 134.21

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Double scale
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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.