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Finding the Fourth Proportional to 933.39, 1,400.56 and 661.23

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Solution

The fourth proportional to 933.39, 1,400.56 and 661.23 is: 992.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.39 : 1,400.56 = 661.23 : x
  2. Step 2: Convert to fraction form
    933.39/1,400.56 = 661.23/x
  3. Step 3: Cross multiply
    933.39x = 1,400.56 × 661.23
  4. Step 4: Simplify right side
    933.39x = 926,090.64
  5. Step 5: Solve for x
    x = 926,090.64/933.39
  6. Step 6: Final answer
    x = 992.18

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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.