Home / 1,640.40-2,464.20-1,210.32

Finding the Fourth Proportional to 1,640.40, 2,464.20 and 1,210.32

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Solution

The fourth proportional to 1,640.40, 2,464.20 and 1,210.32 is: 1,818.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.40 : 2,464.20 = 1,210.32 : x
  2. Step 2: Convert to fraction form
    1,640.40/2,464.20 = 1,210.32/x
  3. Step 3: Cross multiply
    1,640.40x = 2,464.20 × 1,210.32
  4. Step 4: Simplify right side
    1,640.40x = 2,982,470.54
  5. Step 5: Solve for x
    x = 2,982,470.54/1,640.40
  6. Step 6: Final answer
    x = 1,818.14

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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.