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Finding the Fourth Proportional to 1,197.72, 1,652.85 and 673.71

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Solution

The fourth proportional to 1,197.72, 1,652.85 and 673.71 is: 929.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.72 : 1,652.85 = 673.71 : x
  2. Step 2: Convert to fraction form
    1,197.72/1,652.85 = 673.71/x
  3. Step 3: Cross multiply
    1,197.72x = 1,652.85 × 673.71
  4. Step 4: Simplify right side
    1,197.72x = 1,113,541.57
  5. Step 5: Solve for x
    x = 1,113,541.57/1,197.72
  6. Step 6: Final answer
    x = 929.72

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1.5x scale

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.