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Finding the Fourth Proportional to 45.84, 68.50 and 42.40

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Solution

The fourth proportional to 45.84, 68.50 and 42.40 is: 63.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.84 : 68.50 = 42.40 : x
  2. Step 2: Convert to fraction form
    45.84/68.50 = 42.40/x
  3. Step 3: Cross multiply
    45.84x = 68.50 × 42.40
  4. Step 4: Simplify right side
    45.84x = 2,904.40
  5. Step 5: Solve for x
    x = 2,904.40/45.84
  6. Step 6: Final answer
    x = 63.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.