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Finding the Fourth Proportional to 291.10, 436.72 and 208.94

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Solution

The fourth proportional to 291.10, 436.72 and 208.94 is: 313.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.10 : 436.72 = 208.94 : x
  2. Step 2: Convert to fraction form
    291.10/436.72 = 208.94/x
  3. Step 3: Cross multiply
    291.10x = 436.72 × 208.94
  4. Step 4: Simplify right side
    291.10x = 91,248.28
  5. Step 5: Solve for x
    x = 91,248.28/291.10
  6. Step 6: Final answer
    x = 313.46

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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.