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Finding the Fourth Proportional to 1,762.60, 2,643.90 and 1,622.20

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Solution

The fourth proportional to 1,762.60, 2,643.90 and 1,622.20 is: 2,433.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,762.60 : 2,643.90 = 1,622.20 : x
  2. Step 2: Convert to fraction form
    1,762.60/2,643.90 = 1,622.20/x
  3. Step 3: Cross multiply
    1,762.60x = 2,643.90 × 1,622.20
  4. Step 4: Simplify right side
    1,762.60x = 4,288,934.58
  5. Step 5: Solve for x
    x = 4,288,934.58/1,762.60
  6. Step 6: Final answer
    x = 2,433.30

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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.