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Finding the Fourth Proportional to 715.10, 984.26 and 609.85

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Solution

The fourth proportional to 715.10, 984.26 and 609.85 is: 839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.10 : 984.26 = 609.85 : x
  2. Step 2: Convert to fraction form
    715.10/984.26 = 609.85/x
  3. Step 3: Cross multiply
    715.10x = 984.26 × 609.85
  4. Step 4: Simplify right side
    715.10x = 600,257.34
  5. Step 5: Solve for x
    x = 600,257.34/715.10
  6. Step 6: Final answer
    x = 839.40

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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.