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Finding the Fourth Proportional to 657.24, 901.56 and 643.58

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Solution

The fourth proportional to 657.24, 901.56 and 643.58 is: 882.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.24 : 901.56 = 643.58 : x
  2. Step 2: Convert to fraction form
    657.24/901.56 = 643.58/x
  3. Step 3: Cross multiply
    657.24x = 901.56 × 643.58
  4. Step 4: Simplify right side
    657.24x = 580,221.48
  5. Step 5: Solve for x
    x = 580,221.48/657.24
  6. Step 6: Final answer
    x = 882.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.