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Finding the Fourth Proportional to 655.04, 902.76 and 421.76

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Solution

The fourth proportional to 655.04, 902.76 and 421.76 is: 581.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.04 : 902.76 = 421.76 : x
  2. Step 2: Convert to fraction form
    655.04/902.76 = 421.76/x
  3. Step 3: Cross multiply
    655.04x = 902.76 × 421.76
  4. Step 4: Simplify right side
    655.04x = 380,748.06
  5. Step 5: Solve for x
    x = 380,748.06/655.04
  6. Step 6: Final answer
    x = 581.26

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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.