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Finding the Fourth Proportional to 655.67, 904.79 and 422.79

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Solution

The fourth proportional to 655.67, 904.79 and 422.79 is: 583.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.67 : 904.79 = 422.79 : x
  2. Step 2: Convert to fraction form
    655.67/904.79 = 422.79/x
  3. Step 3: Cross multiply
    655.67x = 904.79 × 422.79
  4. Step 4: Simplify right side
    655.67x = 382,534.05
  5. Step 5: Solve for x
    x = 382,534.05/655.67
  6. Step 6: Final answer
    x = 583.43

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1.5x scale

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.