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Finding the Fourth Proportional to 46.08, 69.30 and 45.48

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Solution

The fourth proportional to 46.08, 69.30 and 45.48 is: 68.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.08 : 69.30 = 45.48 : x
  2. Step 2: Convert to fraction form
    46.08/69.30 = 45.48/x
  3. Step 3: Cross multiply
    46.08x = 69.30 × 45.48
  4. Step 4: Simplify right side
    46.08x = 3,151.76
  5. Step 5: Solve for x
    x = 3,151.76/46.08
  6. Step 6: Final answer
    x = 68.40

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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.