Home / 1,938.20-2,909.10-1,664.60

Finding the Fourth Proportional to 1,938.20, 2,909.10 and 1,664.60

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Solution

The fourth proportional to 1,938.20, 2,909.10 and 1,664.60 is: 2,498.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.20 : 2,909.10 = 1,664.60 : x
  2. Step 2: Convert to fraction form
    1,938.20/2,909.10 = 1,664.60/x
  3. Step 3: Cross multiply
    1,938.20x = 2,909.10 × 1,664.60
  4. Step 4: Simplify right side
    1,938.20x = 4,842,487.86
  5. Step 5: Solve for x
    x = 4,842,487.86/1,938.20
  6. Step 6: Final answer
    x = 2,498.45

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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.