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Finding the Fourth Proportional to 614.79, 918.27 and 528.32

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Solution

The fourth proportional to 614.79, 918.27 and 528.32 is: 789.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.79 : 918.27 = 528.32 : x
  2. Step 2: Convert to fraction form
    614.79/918.27 = 528.32/x
  3. Step 3: Cross multiply
    614.79x = 918.27 × 528.32
  4. Step 4: Simplify right side
    614.79x = 485,142.70
  5. Step 5: Solve for x
    x = 485,142.70/614.79
  6. Step 6: Final answer
    x = 789.12

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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.