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Finding the Fourth Proportional to 657.70, 907.72 and 409.08

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Solution

The fourth proportional to 657.70, 907.72 and 409.08 is: 564.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.70 : 907.72 = 409.08 : x
  2. Step 2: Convert to fraction form
    657.70/907.72 = 409.08/x
  3. Step 3: Cross multiply
    657.70x = 907.72 × 409.08
  4. Step 4: Simplify right side
    657.70x = 371,330.10
  5. Step 5: Solve for x
    x = 371,330.10/657.70
  6. Step 6: Final answer
    x = 564.59

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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.