Home / 1,561.10-2,341.20-1,286.51

Finding the Fourth Proportional to 1,561.10, 2,341.20 and 1,286.51

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Solution

The fourth proportional to 1,561.10, 2,341.20 and 1,286.51 is: 1,929.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.10 : 2,341.20 = 1,286.51 : x
  2. Step 2: Convert to fraction form
    1,561.10/2,341.20 = 1,286.51/x
  3. Step 3: Cross multiply
    1,561.10x = 2,341.20 × 1,286.51
  4. Step 4: Simplify right side
    1,561.10x = 3,011,977.21
  5. Step 5: Solve for x
    x = 3,011,977.21/1,561.10
  6. Step 6: Final answer
    x = 1,929.39

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Double scale
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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.