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Finding the Fourth Proportional to 656.07, 905.21 and 446.93

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Solution

The fourth proportional to 656.07, 905.21 and 446.93 is: 616.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.07 : 905.21 = 446.93 : x
  2. Step 2: Convert to fraction form
    656.07/905.21 = 446.93/x
  3. Step 3: Cross multiply
    656.07x = 905.21 × 446.93
  4. Step 4: Simplify right side
    656.07x = 404,563.82
  5. Step 5: Solve for x
    x = 404,563.82/656.07
  6. Step 6: Final answer
    x = 616.65

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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.