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Finding the Fourth Proportional to 286.98, 430.62 and 156.98

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Solution

The fourth proportional to 286.98, 430.62 and 156.98 is: 235.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.98 : 430.62 = 156.98 : x
  2. Step 2: Convert to fraction form
    286.98/430.62 = 156.98/x
  3. Step 3: Cross multiply
    286.98x = 430.62 × 156.98
  4. Step 4: Simplify right side
    286.98x = 67,596.57
  5. Step 5: Solve for x
    x = 67,596.57/286.98
  6. Step 6: Final answer
    x = 235.54

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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.