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Finding the Fourth Proportional to 295.09, 442.64 and 78.67

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Solution

The fourth proportional to 295.09, 442.64 and 78.67 is: 118.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.09 : 442.64 = 78.67 : x
  2. Step 2: Convert to fraction form
    295.09/442.64 = 78.67/x
  3. Step 3: Cross multiply
    295.09x = 442.64 × 78.67
  4. Step 4: Simplify right side
    295.09x = 34,822.49
  5. Step 5: Solve for x
    x = 34,822.49/295.09
  6. Step 6: Final answer
    x = 118.01

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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.