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Finding the Fourth Proportional to 289.30, 399.20 and 250.02

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Solution

The fourth proportional to 289.30, 399.20 and 250.02 is: 345.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.30 : 399.20 = 250.02 : x
  2. Step 2: Convert to fraction form
    289.30/399.20 = 250.02/x
  3. Step 3: Cross multiply
    289.30x = 399.20 × 250.02
  4. Step 4: Simplify right side
    289.30x = 99,807.98
  5. Step 5: Solve for x
    x = 99,807.98/289.30
  6. Step 6: Final answer
    x = 345.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.