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Finding the Fourth Proportional to 245.58, 368.38 and 129.86

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Solution

The fourth proportional to 245.58, 368.38 and 129.86 is: 194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.58 : 368.38 = 129.86 : x
  2. Step 2: Convert to fraction form
    245.58/368.38 = 129.86/x
  3. Step 3: Cross multiply
    245.58x = 368.38 × 129.86
  4. Step 4: Simplify right side
    245.58x = 47,837.83
  5. Step 5: Solve for x
    x = 47,837.83/245.58
  6. Step 6: Final answer
    x = 194.80

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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.