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Finding the Fourth Proportional to 1,650.60, 2,470.02 and 1,390.86

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Solution

The fourth proportional to 1,650.60, 2,470.02 and 1,390.86 is: 2,081.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,650.60 : 2,470.02 = 1,390.86 : x
  2. Step 2: Convert to fraction form
    1,650.60/2,470.02 = 1,390.86/x
  3. Step 3: Cross multiply
    1,650.60x = 2,470.02 × 1,390.86
  4. Step 4: Simplify right side
    1,650.60x = 3,435,452.02
  5. Step 5: Solve for x
    x = 3,435,452.02/1,650.60
  6. Step 6: Final answer
    x = 2,081.34

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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.