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Finding the Fourth Proportional to 235.69, 325.47 and 157.06

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Solution

The fourth proportional to 235.69, 325.47 and 157.06 is: 216.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.69 : 325.47 = 157.06 : x
  2. Step 2: Convert to fraction form
    235.69/325.47 = 157.06/x
  3. Step 3: Cross multiply
    235.69x = 325.47 × 157.06
  4. Step 4: Simplify right side
    235.69x = 51,118.32
  5. Step 5: Solve for x
    x = 51,118.32/235.69
  6. Step 6: Final answer
    x = 216.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.