Home / 1,043.28-1,439.63-623.55

Finding the Fourth Proportional to 1,043.28, 1,439.63 and 623.55

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Solution

The fourth proportional to 1,043.28, 1,439.63 and 623.55 is: 860.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.28 : 1,439.63 = 623.55 : x
  2. Step 2: Convert to fraction form
    1,043.28/1,439.63 = 623.55/x
  3. Step 3: Cross multiply
    1,043.28x = 1,439.63 × 623.55
  4. Step 4: Simplify right side
    1,043.28x = 897,685.93
  5. Step 5: Solve for x
    x = 897,685.93/1,043.28
  6. Step 6: Final answer
    x = 860.44

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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.