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Finding the Fourth Proportional to 684.96, 945 and 449.04

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Solution

The fourth proportional to 684.96, 945 and 449.04 is: 619.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.96 : 945 = 449.04 : x
  2. Step 2: Convert to fraction form
    684.96/945 = 449.04/x
  3. Step 3: Cross multiply
    684.96x = 945 × 449.04
  4. Step 4: Simplify right side
    684.96x = 424,342.80
  5. Step 5: Solve for x
    x = 424,342.80/684.96
  6. Step 6: Final answer
    x = 619.51

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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.