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Finding the Fourth Proportional to 657.95, 907.88 and 409.28

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Solution

The fourth proportional to 657.95, 907.88 and 409.28 is: 564.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.95 : 907.88 = 409.28 : x
  2. Step 2: Convert to fraction form
    657.95/907.88 = 409.28/x
  3. Step 3: Cross multiply
    657.95x = 907.88 × 409.28
  4. Step 4: Simplify right side
    657.95x = 371,570.54
  5. Step 5: Solve for x
    x = 371,570.54/657.95
  6. Step 6: Final answer
    x = 564.74

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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.