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Finding the Fourth Proportional to 2,686.54, 3,707.72 and 1,790.22

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Solution

The fourth proportional to 2,686.54, 3,707.72 and 1,790.22 is: 2,470.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.54 : 3,707.72 = 1,790.22 : x
  2. Step 2: Convert to fraction form
    2,686.54/3,707.72 = 1,790.22/x
  3. Step 3: Cross multiply
    2,686.54x = 3,707.72 × 1,790.22
  4. Step 4: Simplify right side
    2,686.54x = 6,637,634.50
  5. Step 5: Solve for x
    x = 6,637,634.50/2,686.54
  6. Step 6: Final answer
    x = 2,470.70

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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.