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Finding the Fourth Proportional to 657.21, 901.07 and 645.51

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Solution

The fourth proportional to 657.21, 901.07 and 645.51 is: 885.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.21 : 901.07 = 645.51 : x
  2. Step 2: Convert to fraction form
    657.21/901.07 = 645.51/x
  3. Step 3: Cross multiply
    657.21x = 901.07 × 645.51
  4. Step 4: Simplify right side
    657.21x = 581,646.47
  5. Step 5: Solve for x
    x = 581,646.47/657.21
  6. Step 6: Final answer
    x = 885.02

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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.