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Finding the Fourth Proportional to 615.26, 918.37 and 543.17

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Solution

The fourth proportional to 615.26, 918.37 and 543.17 is: 810.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.26 : 918.37 = 543.17 : x
  2. Step 2: Convert to fraction form
    615.26/918.37 = 543.17/x
  3. Step 3: Cross multiply
    615.26x = 918.37 × 543.17
  4. Step 4: Simplify right side
    615.26x = 498,831.03
  5. Step 5: Solve for x
    x = 498,831.03/615.26
  6. Step 6: Final answer
    x = 810.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.