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Finding the Fourth Proportional to 640.03, 955.65 and 573.71

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Solution

The fourth proportional to 640.03, 955.65 and 573.71 is: 856.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.03 : 955.65 = 573.71 : x
  2. Step 2: Convert to fraction form
    640.03/955.65 = 573.71/x
  3. Step 3: Cross multiply
    640.03x = 955.65 × 573.71
  4. Step 4: Simplify right side
    640.03x = 548,265.96
  5. Step 5: Solve for x
    x = 548,265.96/640.03
  6. Step 6: Final answer
    x = 856.63

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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.