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Finding the Fourth Proportional to 157.61, 217.70 and 151.99

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Solution

The fourth proportional to 157.61, 217.70 and 151.99 is: 209.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.61 : 217.70 = 151.99 : x
  2. Step 2: Convert to fraction form
    157.61/217.70 = 151.99/x
  3. Step 3: Cross multiply
    157.61x = 217.70 × 151.99
  4. Step 4: Simplify right side
    157.61x = 33,088.22
  5. Step 5: Solve for x
    x = 33,088.22/157.61
  6. Step 6: Final answer
    x = 209.94

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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.