Home / 2,070.32-2,856.51-1,231.20

Finding the Fourth Proportional to 2,070.32, 2,856.51 and 1,231.20

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Solution

The fourth proportional to 2,070.32, 2,856.51 and 1,231.20 is: 1,698.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,070.32 : 2,856.51 = 1,231.20 : x
  2. Step 2: Convert to fraction form
    2,070.32/2,856.51 = 1,231.20/x
  3. Step 3: Cross multiply
    2,070.32x = 2,856.51 × 1,231.20
  4. Step 4: Simplify right side
    2,070.32x = 3,516,935.11
  5. Step 5: Solve for x
    x = 3,516,935.11/2,070.32
  6. Step 6: Final answer
    x = 1,698.74

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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.