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Finding the Fourth Proportional to 657.70, 907.60 and 395.66

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Solution

The fourth proportional to 657.70, 907.60 and 395.66 is: 546.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.70 : 907.60 = 395.66 : x
  2. Step 2: Convert to fraction form
    657.70/907.60 = 395.66/x
  3. Step 3: Cross multiply
    657.70x = 907.60 × 395.66
  4. Step 4: Simplify right side
    657.70x = 359,103.04
  5. Step 5: Solve for x
    x = 359,103.04/657.70
  6. Step 6: Final answer
    x = 546.00

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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.