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Finding the Fourth Proportional to 436.34, 654.50 and 158.70

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Solution

The fourth proportional to 436.34, 654.50 and 158.70 is: 238.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.34 : 654.50 = 158.70 : x
  2. Step 2: Convert to fraction form
    436.34/654.50 = 158.70/x
  3. Step 3: Cross multiply
    436.34x = 654.50 × 158.70
  4. Step 4: Simplify right side
    436.34x = 103,868.36
  5. Step 5: Solve for x
    x = 103,868.36/436.34
  6. Step 6: Final answer
    x = 238.05

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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.