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Finding the Fourth Proportional to 734.45, 1,013.56 and 402.88

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Solution

The fourth proportional to 734.45, 1,013.56 and 402.88 is: 555.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.45 : 1,013.56 = 402.88 : x
  2. Step 2: Convert to fraction form
    734.45/1,013.56 = 402.88/x
  3. Step 3: Cross multiply
    734.45x = 1,013.56 × 402.88
  4. Step 4: Simplify right side
    734.45x = 408,344.82
  5. Step 5: Solve for x
    x = 408,344.82/734.45
  6. Step 6: Final answer
    x = 555.99

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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.