Home / 1,439.59-2,159.14-385.41

Finding the Fourth Proportional to 1,439.59, 2,159.14 and 385.41

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Solution

The fourth proportional to 1,439.59, 2,159.14 and 385.41 is: 578.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.59 : 2,159.14 = 385.41 : x
  2. Step 2: Convert to fraction form
    1,439.59/2,159.14 = 385.41/x
  3. Step 3: Cross multiply
    1,439.59x = 2,159.14 × 385.41
  4. Step 4: Simplify right side
    1,439.59x = 832,154.15
  5. Step 5: Solve for x
    x = 832,154.15/1,439.59
  6. Step 6: Final answer
    x = 578.05

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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.