Home / 1,555.18-2,320.76-1,388.88

Finding the Fourth Proportional to 1,555.18, 2,320.76 and 1,388.88

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Solution

The fourth proportional to 1,555.18, 2,320.76 and 1,388.88 is: 2,072.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.18 : 2,320.76 = 1,388.88 : x
  2. Step 2: Convert to fraction form
    1,555.18/2,320.76 = 1,388.88/x
  3. Step 3: Cross multiply
    1,555.18x = 2,320.76 × 1,388.88
  4. Step 4: Simplify right side
    1,555.18x = 3,223,257.15
  5. Step 5: Solve for x
    x = 3,223,257.15/1,555.18
  6. Step 6: Final answer
    x = 2,072.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.