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Finding the Fourth Proportional to 805.02, 1,113.39 and 717.54

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Solution

The fourth proportional to 805.02, 1,113.39 and 717.54 is: 992.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.02 : 1,113.39 = 717.54 : x
  2. Step 2: Convert to fraction form
    805.02/1,113.39 = 717.54/x
  3. Step 3: Cross multiply
    805.02x = 1,113.39 × 717.54
  4. Step 4: Simplify right side
    805.02x = 798,901.86
  5. Step 5: Solve for x
    x = 798,901.86/805.02
  6. Step 6: Final answer
    x = 992.40

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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.