Home / 1,555.32-2,320.44-1,398.72

Finding the Fourth Proportional to 1,555.32, 2,320.44 and 1,398.72

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Solution

The fourth proportional to 1,555.32, 2,320.44 and 1,398.72 is: 2,086.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.32 : 2,320.44 = 1,398.72 : x
  2. Step 2: Convert to fraction form
    1,555.32/2,320.44 = 1,398.72/x
  3. Step 3: Cross multiply
    1,555.32x = 2,320.44 × 1,398.72
  4. Step 4: Simplify right side
    1,555.32x = 3,245,645.84
  5. Step 5: Solve for x
    x = 3,245,645.84/1,555.32
  6. Step 6: Final answer
    x = 2,086.80

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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.