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Finding the Fourth Proportional to 710.98, 981.17 and 400.48

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Solution

The fourth proportional to 710.98, 981.17 and 400.48 is: 552.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.98 : 981.17 = 400.48 : x
  2. Step 2: Convert to fraction form
    710.98/981.17 = 400.48/x
  3. Step 3: Cross multiply
    710.98x = 981.17 × 400.48
  4. Step 4: Simplify right side
    710.98x = 392,938.96
  5. Step 5: Solve for x
    x = 392,938.96/710.98
  6. Step 6: Final answer
    x = 552.67

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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.