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Finding the Fourth Proportional to 154.98, 215.27 and 152.50

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Solution

The fourth proportional to 154.98, 215.27 and 152.50 is: 211.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.98 : 215.27 = 152.50 : x
  2. Step 2: Convert to fraction form
    154.98/215.27 = 152.50/x
  3. Step 3: Cross multiply
    154.98x = 215.27 × 152.50
  4. Step 4: Simplify right side
    154.98x = 32,829.21
  5. Step 5: Solve for x
    x = 32,829.21/154.98
  6. Step 6: Final answer
    x = 211.83

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.