Home / 1,555.80-2,147.37-966.78

Finding the Fourth Proportional to 1,555.80, 2,147.37 and 966.78

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Solution

The fourth proportional to 1,555.80, 2,147.37 and 966.78 is: 1,334.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.80 : 2,147.37 = 966.78 : x
  2. Step 2: Convert to fraction form
    1,555.80/2,147.37 = 966.78/x
  3. Step 3: Cross multiply
    1,555.80x = 2,147.37 × 966.78
  4. Step 4: Simplify right side
    1,555.80x = 2,076,034.37
  5. Step 5: Solve for x
    x = 2,076,034.37/1,555.80
  6. Step 6: Final answer
    x = 1,334.38

Related Problems

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Half scale
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Double scale
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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.