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Finding the Fourth Proportional to 720.36, 994.58 and 554.28

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Solution

The fourth proportional to 720.36, 994.58 and 554.28 is: 765.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.36 : 994.58 = 554.28 : x
  2. Step 2: Convert to fraction form
    720.36/994.58 = 554.28/x
  3. Step 3: Cross multiply
    720.36x = 994.58 × 554.28
  4. Step 4: Simplify right side
    720.36x = 551,273.03
  5. Step 5: Solve for x
    x = 551,273.03/720.36
  6. Step 6: Final answer
    x = 765.27

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1.5x scale

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.