Home / 2,690.32-3,712.80-1,642.72

Finding the Fourth Proportional to 2,690.32, 3,712.80 and 1,642.72

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Solution

The fourth proportional to 2,690.32, 3,712.80 and 1,642.72 is: 2,267.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.32 : 3,712.80 = 1,642.72 : x
  2. Step 2: Convert to fraction form
    2,690.32/3,712.80 = 1,642.72/x
  3. Step 3: Cross multiply
    2,690.32x = 3,712.80 × 1,642.72
  4. Step 4: Simplify right side
    2,690.32x = 6,099,090.82
  5. Step 5: Solve for x
    x = 6,099,090.82/2,690.32
  6. Step 6: Final answer
    x = 2,267.05

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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.