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Finding the Fourth Proportional to 940.98, 1,411.47 and 247.60

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Solution

The fourth proportional to 940.98, 1,411.47 and 247.60 is: 371.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.98 : 1,411.47 = 247.60 : x
  2. Step 2: Convert to fraction form
    940.98/1,411.47 = 247.60/x
  3. Step 3: Cross multiply
    940.98x = 1,411.47 × 247.60
  4. Step 4: Simplify right side
    940.98x = 349,479.97
  5. Step 5: Solve for x
    x = 349,479.97/940.98
  6. Step 6: Final answer
    x = 371.40

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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.