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Finding the Fourth Proportional to 189.99, 284.63 and 98.59

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Solution

The fourth proportional to 189.99, 284.63 and 98.59 is: 147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.99 : 284.63 = 98.59 : x
  2. Step 2: Convert to fraction form
    189.99/284.63 = 98.59/x
  3. Step 3: Cross multiply
    189.99x = 284.63 × 98.59
  4. Step 4: Simplify right side
    189.99x = 28,060.00
  5. Step 5: Solve for x
    x = 28,060.00/189.99
  6. Step 6: Final answer
    x = 147.70

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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.