Home / 1,555.19-2,146.18-856.57

Finding the Fourth Proportional to 1,555.19, 2,146.18 and 856.57

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Solution

The fourth proportional to 1,555.19, 2,146.18 and 856.57 is: 1,182.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.19 : 2,146.18 = 856.57 : x
  2. Step 2: Convert to fraction form
    1,555.19/2,146.18 = 856.57/x
  3. Step 3: Cross multiply
    1,555.19x = 2,146.18 × 856.57
  4. Step 4: Simplify right side
    1,555.19x = 1,838,338.39
  5. Step 5: Solve for x
    x = 1,838,338.39/1,555.19
  6. Step 6: Final answer
    x = 1,182.07

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Half scale
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Double scale
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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.