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Finding the Fourth Proportional to 415.69, 573.43 and 317.28

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Solution

The fourth proportional to 415.69, 573.43 and 317.28 is: 437.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.69 : 573.43 = 317.28 : x
  2. Step 2: Convert to fraction form
    415.69/573.43 = 317.28/x
  3. Step 3: Cross multiply
    415.69x = 573.43 × 317.28
  4. Step 4: Simplify right side
    415.69x = 181,937.87
  5. Step 5: Solve for x
    x = 181,937.87/415.69
  6. Step 6: Final answer
    x = 437.68

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.