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Finding the Fourth Proportional to 613.55, 846.70 and 351.57

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Solution

The fourth proportional to 613.55, 846.70 and 351.57 is: 485.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.55 : 846.70 = 351.57 : x
  2. Step 2: Convert to fraction form
    613.55/846.70 = 351.57/x
  3. Step 3: Cross multiply
    613.55x = 846.70 × 351.57
  4. Step 4: Simplify right side
    613.55x = 297,674.32
  5. Step 5: Solve for x
    x = 297,674.32/613.55
  6. Step 6: Final answer
    x = 485.17

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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.