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Finding the Fourth Proportional to 634.81, 876.45 and 402.34

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Solution

The fourth proportional to 634.81, 876.45 and 402.34 is: 555.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.81 : 876.45 = 402.34 : x
  2. Step 2: Convert to fraction form
    634.81/876.45 = 402.34/x
  3. Step 3: Cross multiply
    634.81x = 876.45 × 402.34
  4. Step 4: Simplify right side
    634.81x = 352,630.89
  5. Step 5: Solve for x
    x = 352,630.89/634.81
  6. Step 6: Final answer
    x = 555.49

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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.