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Finding the Fourth Proportional to 613.62, 846.45 and 438.66

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Solution

The fourth proportional to 613.62, 846.45 and 438.66 is: 605.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.62 : 846.45 = 438.66 : x
  2. Step 2: Convert to fraction form
    613.62/846.45 = 438.66/x
  3. Step 3: Cross multiply
    613.62x = 846.45 × 438.66
  4. Step 4: Simplify right side
    613.62x = 371,303.76
  5. Step 5: Solve for x
    x = 371,303.76/613.62
  6. Step 6: Final answer
    x = 605.10

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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.