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Finding the Fourth Proportional to 1,098.41, 1,646.78 and 946.13

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Solution

The fourth proportional to 1,098.41, 1,646.78 and 946.13 is: 1,418.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.41 : 1,646.78 = 946.13 : x
  2. Step 2: Convert to fraction form
    1,098.41/1,646.78 = 946.13/x
  3. Step 3: Cross multiply
    1,098.41x = 1,646.78 × 946.13
  4. Step 4: Simplify right side
    1,098.41x = 1,558,055.00
  5. Step 5: Solve for x
    x = 1,558,055.00/1,098.41
  6. Step 6: Final answer
    x = 1,418.47

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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.