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Finding the Fourth Proportional to 1,622.45, 2,433.90 and 648.47

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Solution

The fourth proportional to 1,622.45, 2,433.90 and 648.47 is: 972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,622.45 : 2,433.90 = 648.47 : x
  2. Step 2: Convert to fraction form
    1,622.45/2,433.90 = 648.47/x
  3. Step 3: Cross multiply
    1,622.45x = 2,433.90 × 648.47
  4. Step 4: Simplify right side
    1,622.45x = 1,578,298.96
  5. Step 5: Solve for x
    x = 1,578,298.96/1,622.45
  6. Step 6: Final answer
    x = 972.79

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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.