Home / 1,384.12-2,076.43-459.58

Finding the Fourth Proportional to 1,384.12, 2,076.43 and 459.58

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Solution

The fourth proportional to 1,384.12, 2,076.43 and 459.58 is: 689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.12 : 2,076.43 = 459.58 : x
  2. Step 2: Convert to fraction form
    1,384.12/2,076.43 = 459.58/x
  3. Step 3: Cross multiply
    1,384.12x = 2,076.43 × 459.58
  4. Step 4: Simplify right side
    1,384.12x = 954,283.40
  5. Step 5: Solve for x
    x = 954,283.40/1,384.12
  6. Step 6: Final answer
    x = 689.45

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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.