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Finding the Fourth Proportional to 291.63, 436.77 and 147

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Solution

The fourth proportional to 291.63, 436.77 and 147 is: 220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.63 : 436.77 = 147 : x
  2. Step 2: Convert to fraction form
    291.63/436.77 = 147/x
  3. Step 3: Cross multiply
    291.63x = 436.77 × 147
  4. Step 4: Simplify right side
    291.63x = 64,205.19
  5. Step 5: Solve for x
    x = 64,205.19/291.63
  6. Step 6: Final answer
    x = 220.16

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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.