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Finding the Fourth Proportional to 2,686.90, 3,707.95 and 1,507.99

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Solution

The fourth proportional to 2,686.90, 3,707.95 and 1,507.99 is: 2,081.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.90 : 3,707.95 = 1,507.99 : x
  2. Step 2: Convert to fraction form
    2,686.90/3,707.95 = 1,507.99/x
  3. Step 3: Cross multiply
    2,686.90x = 3,707.95 × 1,507.99
  4. Step 4: Simplify right side
    2,686.90x = 5,591,532.98
  5. Step 5: Solve for x
    x = 5,591,532.98/2,686.90
  6. Step 6: Final answer
    x = 2,081.04

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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.