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Finding the Fourth Proportional to 245.80, 368.65 and 72.46

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Solution

The fourth proportional to 245.80, 368.65 and 72.46 is: 108.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.80 : 368.65 = 72.46 : x
  2. Step 2: Convert to fraction form
    245.80/368.65 = 72.46/x
  3. Step 3: Cross multiply
    245.80x = 368.65 × 72.46
  4. Step 4: Simplify right side
    245.80x = 26,712.93
  5. Step 5: Solve for x
    x = 26,712.93/245.80
  6. Step 6: Final answer
    x = 108.68

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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.