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Finding the Fourth Proportional to 436.10, 653.34 and 291.56

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Solution

The fourth proportional to 436.10, 653.34 and 291.56 is: 436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.10 : 653.34 = 291.56 : x
  2. Step 2: Convert to fraction form
    436.10/653.34 = 291.56/x
  3. Step 3: Cross multiply
    436.10x = 653.34 × 291.56
  4. Step 4: Simplify right side
    436.10x = 190,487.81
  5. Step 5: Solve for x
    x = 190,487.81/436.10
  6. Step 6: Final answer
    x = 436.80

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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.