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Finding the Fourth Proportional to 29.70, 42.50 and 29.70

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Solution

The fourth proportional to 29.70, 42.50 and 29.70 is: 42.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.70 : 42.50 = 29.70 : x
  2. Step 2: Convert to fraction form
    29.70/42.50 = 29.70/x
  3. Step 3: Cross multiply
    29.70x = 42.50 × 29.70
  4. Step 4: Simplify right side
    29.70x = 1,262.25
  5. Step 5: Solve for x
    x = 1,262.25/29.70
  6. Step 6: Final answer
    x = 42.50

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.