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Finding the Fourth Proportional to 291.08, 436.80 and 98.84

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Solution

The fourth proportional to 291.08, 436.80 and 98.84 is: 148.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.08 : 436.80 = 98.84 : x
  2. Step 2: Convert to fraction form
    291.08/436.80 = 98.84/x
  3. Step 3: Cross multiply
    291.08x = 436.80 × 98.84
  4. Step 4: Simplify right side
    291.08x = 43,173.31
  5. Step 5: Solve for x
    x = 43,173.31/291.08
  6. Step 6: Final answer
    x = 148.32

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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.