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Finding the Fourth Proportional to 657.85, 907.80 and 396.01

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Solution

The fourth proportional to 657.85, 907.80 and 396.01 is: 546.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.85 : 907.80 = 396.01 : x
  2. Step 2: Convert to fraction form
    657.85/907.80 = 396.01/x
  3. Step 3: Cross multiply
    657.85x = 907.80 × 396.01
  4. Step 4: Simplify right side
    657.85x = 359,497.88
  5. Step 5: Solve for x
    x = 359,497.88/657.85
  6. Step 6: Final answer
    x = 546.47

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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.