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Finding the Fourth Proportional to 340.70, 510.71 and 157.86

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Solution

The fourth proportional to 340.70, 510.71 and 157.86 is: 236.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.70 : 510.71 = 157.86 : x
  2. Step 2: Convert to fraction form
    340.70/510.71 = 157.86/x
  3. Step 3: Cross multiply
    340.70x = 510.71 × 157.86
  4. Step 4: Simplify right side
    340.70x = 80,619.89
  5. Step 5: Solve for x
    x = 80,619.89/340.70
  6. Step 6: Final answer
    x = 236.63

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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.