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Finding the Fourth Proportional to 617.09, 920.71 and 573.53

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Solution

The fourth proportional to 617.09, 920.71 and 573.53 is: 855.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.09 : 920.71 = 573.53 : x
  2. Step 2: Convert to fraction form
    617.09/920.71 = 573.53/x
  3. Step 3: Cross multiply
    617.09x = 920.71 × 573.53
  4. Step 4: Simplify right side
    617.09x = 528,050.92
  5. Step 5: Solve for x
    x = 528,050.92/617.09
  6. Step 6: Final answer
    x = 855.72

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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.