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Finding the Fourth Proportional to 673.71, 1,015.55 and 615.39

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Solution

The fourth proportional to 673.71, 1,015.55 and 615.39 is: 927.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.71 : 1,015.55 = 615.39 : x
  2. Step 2: Convert to fraction form
    673.71/1,015.55 = 615.39/x
  3. Step 3: Cross multiply
    673.71x = 1,015.55 × 615.39
  4. Step 4: Simplify right side
    673.71x = 624,956.24
  5. Step 5: Solve for x
    x = 624,956.24/673.71
  6. Step 6: Final answer
    x = 927.63

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.