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Finding the Fourth Proportional to 640.04, 957.27 and 552.56

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Solution

The fourth proportional to 640.04, 957.27 and 552.56 is: 826.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.04 : 957.27 = 552.56 : x
  2. Step 2: Convert to fraction form
    640.04/957.27 = 552.56/x
  3. Step 3: Cross multiply
    640.04x = 957.27 × 552.56
  4. Step 4: Simplify right side
    640.04x = 528,949.11
  5. Step 5: Solve for x
    x = 528,949.11/640.04
  6. Step 6: Final answer
    x = 826.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.