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Finding the Fourth Proportional to 1,275.23, 1,913.03 and 453.43

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Solution

The fourth proportional to 1,275.23, 1,913.03 and 453.43 is: 680.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.23 : 1,913.03 = 453.43 : x
  2. Step 2: Convert to fraction form
    1,275.23/1,913.03 = 453.43/x
  3. Step 3: Cross multiply
    1,275.23x = 1,913.03 × 453.43
  4. Step 4: Simplify right side
    1,275.23x = 867,425.19
  5. Step 5: Solve for x
    x = 867,425.19/1,275.23
  6. Step 6: Final answer
    x = 680.21

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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.