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Finding the Fourth Proportional to 155.70, 233.54 and 64.34

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Solution

The fourth proportional to 155.70, 233.54 and 64.34 is: 96.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.70 : 233.54 = 64.34 : x
  2. Step 2: Convert to fraction form
    155.70/233.54 = 64.34/x
  3. Step 3: Cross multiply
    155.70x = 233.54 × 64.34
  4. Step 4: Simplify right side
    155.70x = 15,024.80
  5. Step 5: Solve for x
    x = 15,024.80/155.70
  6. Step 6: Final answer
    x = 96.50

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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.