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Finding the Fourth Proportional to 715.43, 984.33 and 631.05

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Solution

The fourth proportional to 715.43, 984.33 and 631.05 is: 868.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.43 : 984.33 = 631.05 : x
  2. Step 2: Convert to fraction form
    715.43/984.33 = 631.05/x
  3. Step 3: Cross multiply
    715.43x = 984.33 × 631.05
  4. Step 4: Simplify right side
    715.43x = 621,161.45
  5. Step 5: Solve for x
    x = 621,161.45/715.43
  6. Step 6: Final answer
    x = 868.24

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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.