Home / 1,727.20-2,590.80-1,686.70

Finding the Fourth Proportional to 1,727.20, 2,590.80 and 1,686.70

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Solution

The fourth proportional to 1,727.20, 2,590.80 and 1,686.70 is: 2,530.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.20 : 2,590.80 = 1,686.70 : x
  2. Step 2: Convert to fraction form
    1,727.20/2,590.80 = 1,686.70/x
  3. Step 3: Cross multiply
    1,727.20x = 2,590.80 × 1,686.70
  4. Step 4: Simplify right side
    1,727.20x = 4,369,902.36
  5. Step 5: Solve for x
    x = 4,369,902.36/1,727.20
  6. Step 6: Final answer
    x = 2,530.05

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1.5x scale

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.