Home / 1,690.32-2,331.61-1,027.61

Finding the Fourth Proportional to 1,690.32, 2,331.61 and 1,027.61

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Solution

The fourth proportional to 1,690.32, 2,331.61 and 1,027.61 is: 1,417.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.32 : 2,331.61 = 1,027.61 : x
  2. Step 2: Convert to fraction form
    1,690.32/2,331.61 = 1,027.61/x
  3. Step 3: Cross multiply
    1,690.32x = 2,331.61 × 1,027.61
  4. Step 4: Simplify right side
    1,690.32x = 2,395,985.75
  5. Step 5: Solve for x
    x = 2,395,985.75/1,690.32
  6. Step 6: Final answer
    x = 1,417.47

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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.