Home / 1,911.60-2,637.24-1,386.48

Finding the Fourth Proportional to 1,911.60, 2,637.24 and 1,386.48

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Solution

The fourth proportional to 1,911.60, 2,637.24 and 1,386.48 is: 1,912.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.60 : 2,637.24 = 1,386.48 : x
  2. Step 2: Convert to fraction form
    1,911.60/2,637.24 = 1,386.48/x
  3. Step 3: Cross multiply
    1,911.60x = 2,637.24 × 1,386.48
  4. Step 4: Simplify right side
    1,911.60x = 3,656,480.52
  5. Step 5: Solve for x
    x = 3,656,480.52/1,911.60
  6. Step 6: Final answer
    x = 1,912.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.