Home / 1,384.38-2,076.66-459.90

Finding the Fourth Proportional to 1,384.38, 2,076.66 and 459.90

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Solution

The fourth proportional to 1,384.38, 2,076.66 and 459.90 is: 689.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.38 : 2,076.66 = 459.90 : x
  2. Step 2: Convert to fraction form
    1,384.38/2,076.66 = 459.90/x
  3. Step 3: Cross multiply
    1,384.38x = 2,076.66 × 459.90
  4. Step 4: Simplify right side
    1,384.38x = 955,055.93
  5. Step 5: Solve for x
    x = 955,055.93/1,384.38
  6. Step 6: Final answer
    x = 689.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.