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Finding the Fourth Proportional to 245.48, 368.52 and 129.90

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Solution

The fourth proportional to 245.48, 368.52 and 129.90 is: 195.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.48 : 368.52 = 129.90 : x
  2. Step 2: Convert to fraction form
    245.48/368.52 = 129.90/x
  3. Step 3: Cross multiply
    245.48x = 368.52 × 129.90
  4. Step 4: Simplify right side
    245.48x = 47,871.64
  5. Step 5: Solve for x
    x = 47,871.64/245.48
  6. Step 6: Final answer
    x = 195.01

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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.