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Finding the Fourth Proportional to 346.49, 519.73 and 89.99

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Solution

The fourth proportional to 346.49, 519.73 and 89.99 is: 134.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.49 : 519.73 = 89.99 : x
  2. Step 2: Convert to fraction form
    346.49/519.73 = 89.99/x
  3. Step 3: Cross multiply
    346.49x = 519.73 × 89.99
  4. Step 4: Simplify right side
    346.49x = 46,770.50
  5. Step 5: Solve for x
    x = 46,770.50/346.49
  6. Step 6: Final answer
    x = 134.98

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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.