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Finding the Fourth Proportional to 940.01, 1,297.82 and 720.09

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Solution

The fourth proportional to 940.01, 1,297.82 and 720.09 is: 994.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.01 : 1,297.82 = 720.09 : x
  2. Step 2: Convert to fraction form
    940.01/1,297.82 = 720.09/x
  3. Step 3: Cross multiply
    940.01x = 1,297.82 × 720.09
  4. Step 4: Simplify right side
    940.01x = 934,549.00
  5. Step 5: Solve for x
    x = 934,549.00/940.01
  6. Step 6: Final answer
    x = 994.20

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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.