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Finding the Fourth Proportional to 718.60, 992.12 and 453.40

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Solution

The fourth proportional to 718.60, 992.12 and 453.40 is: 625.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.60 : 992.12 = 453.40 : x
  2. Step 2: Convert to fraction form
    718.60/992.12 = 453.40/x
  3. Step 3: Cross multiply
    718.60x = 992.12 × 453.40
  4. Step 4: Simplify right side
    718.60x = 449,826.29
  5. Step 5: Solve for x
    x = 449,826.29/718.60
  6. Step 6: Final answer
    x = 625.98

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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.