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Finding the Fourth Proportional to 656.73, 907.28 and 490.65

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Solution

The fourth proportional to 656.73, 907.28 and 490.65 is: 677.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.73 : 907.28 = 490.65 : x
  2. Step 2: Convert to fraction form
    656.73/907.28 = 490.65/x
  3. Step 3: Cross multiply
    656.73x = 907.28 × 490.65
  4. Step 4: Simplify right side
    656.73x = 445,154.48
  5. Step 5: Solve for x
    x = 445,154.48/656.73
  6. Step 6: Final answer
    x = 677.83

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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.