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Finding the Fourth Proportional to 830.01, 1,243.99 and 727.49

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Solution

The fourth proportional to 830.01, 1,243.99 and 727.49 is: 1,090.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.01 : 1,243.99 = 727.49 : x
  2. Step 2: Convert to fraction form
    830.01/1,243.99 = 727.49/x
  3. Step 3: Cross multiply
    830.01x = 1,243.99 × 727.49
  4. Step 4: Simplify right side
    830.01x = 904,990.29
  5. Step 5: Solve for x
    x = 904,990.29/830.01
  6. Step 6: Final answer
    x = 1,090.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.