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Finding the Fourth Proportional to 395.83, 544.74 and 385.66

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Solution

The fourth proportional to 395.83, 544.74 and 385.66 is: 530.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.83 : 544.74 = 385.66 : x
  2. Step 2: Convert to fraction form
    395.83/544.74 = 385.66/x
  3. Step 3: Cross multiply
    395.83x = 544.74 × 385.66
  4. Step 4: Simplify right side
    395.83x = 210,084.43
  5. Step 5: Solve for x
    x = 210,084.43/395.83
  6. Step 6: Final answer
    x = 530.74

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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.