Home / 1,550.19-2,139.40-851.70

Finding the Fourth Proportional to 1,550.19, 2,139.40 and 851.70

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Solution

The fourth proportional to 1,550.19, 2,139.40 and 851.70 is: 1,175.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.19 : 2,139.40 = 851.70 : x
  2. Step 2: Convert to fraction form
    1,550.19/2,139.40 = 851.70/x
  3. Step 3: Cross multiply
    1,550.19x = 2,139.40 × 851.70
  4. Step 4: Simplify right side
    1,550.19x = 1,822,126.98
  5. Step 5: Solve for x
    x = 1,822,126.98/1,550.19
  6. Step 6: Final answer
    x = 1,175.42

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,551.19, 2,140.78 and 852.70
Similar ratio
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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.