Home / 1,555.50-2,343.96-1,287.60

Finding the Fourth Proportional to 1,555.50, 2,343.96 and 1,287.60

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Solution

The fourth proportional to 1,555.50, 2,343.96 and 1,287.60 is: 1,940.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.50 : 2,343.96 = 1,287.60 : x
  2. Step 2: Convert to fraction form
    1,555.50/2,343.96 = 1,287.60/x
  3. Step 3: Cross multiply
    1,555.50x = 2,343.96 × 1,287.60
  4. Step 4: Simplify right side
    1,555.50x = 3,018,082.90
  5. Step 5: Solve for x
    x = 3,018,082.90/1,555.50
  6. Step 6: Final answer
    x = 1,940.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.