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Finding the Fourth Proportional to 940.86, 1,411.53 and 924.54

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Solution

The fourth proportional to 940.86, 1,411.53 and 924.54 is: 1,387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.86 : 1,411.53 = 924.54 : x
  2. Step 2: Convert to fraction form
    940.86/1,411.53 = 924.54/x
  3. Step 3: Cross multiply
    940.86x = 1,411.53 × 924.54
  4. Step 4: Simplify right side
    940.86x = 1,305,015.95
  5. Step 5: Solve for x
    x = 1,305,015.95/940.86
  6. Step 6: Final answer
    x = 1,387.05

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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.