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Finding the Fourth Proportional to 940.03, 1,290.28 and 899.93

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Solution

The fourth proportional to 940.03, 1,290.28 and 899.93 is: 1,235.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.03 : 1,290.28 = 899.93 : x
  2. Step 2: Convert to fraction form
    940.03/1,290.28 = 899.93/x
  3. Step 3: Cross multiply
    940.03x = 1,290.28 × 899.93
  4. Step 4: Simplify right side
    940.03x = 1,161,161.68
  5. Step 5: Solve for x
    x = 1,161,161.68/940.03
  6. Step 6: Final answer
    x = 1,235.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.