Home / 1,489.05-2,054.59-964.78

Finding the Fourth Proportional to 1,489.05, 2,054.59 and 964.78

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Solution

The fourth proportional to 1,489.05, 2,054.59 and 964.78 is: 1,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.05 : 2,054.59 = 964.78 : x
  2. Step 2: Convert to fraction form
    1,489.05/2,054.59 = 964.78/x
  3. Step 3: Cross multiply
    1,489.05x = 2,054.59 × 964.78
  4. Step 4: Simplify right side
    1,489.05x = 1,982,219.79
  5. Step 5: Solve for x
    x = 1,982,219.79/1,489.05
  6. Step 6: Final answer
    x = 1,331.20

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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.