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Finding the Fourth Proportional to 720.88, 994.40 and 472.14

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Solution

The fourth proportional to 720.88, 994.40 and 472.14 is: 651.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.88 : 994.40 = 472.14 : x
  2. Step 2: Convert to fraction form
    720.88/994.40 = 472.14/x
  3. Step 3: Cross multiply
    720.88x = 994.40 × 472.14
  4. Step 4: Simplify right side
    720.88x = 469,496.02
  5. Step 5: Solve for x
    x = 469,496.02/720.88
  6. Step 6: Final answer
    x = 651.28

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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.