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Finding the Fourth Proportional to 655.40, 906.18 and 573.40

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Solution

The fourth proportional to 655.40, 906.18 and 573.40 is: 792.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.40 : 906.18 = 573.40 : x
  2. Step 2: Convert to fraction form
    655.40/906.18 = 573.40/x
  3. Step 3: Cross multiply
    655.40x = 906.18 × 573.40
  4. Step 4: Simplify right side
    655.40x = 519,603.61
  5. Step 5: Solve for x
    x = 519,603.61/655.40
  6. Step 6: Final answer
    x = 792.80

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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.