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Finding the Fourth Proportional to 613.48, 846.90 and 380.74

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Solution

The fourth proportional to 613.48, 846.90 and 380.74 is: 525.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.48 : 846.90 = 380.74 : x
  2. Step 2: Convert to fraction form
    613.48/846.90 = 380.74/x
  3. Step 3: Cross multiply
    613.48x = 846.90 × 380.74
  4. Step 4: Simplify right side
    613.48x = 322,448.71
  5. Step 5: Solve for x
    x = 322,448.71/613.48
  6. Step 6: Final answer
    x = 525.61

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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.