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Finding the Fourth Proportional to 1,097.67, 1,646.81 and 611.07

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Solution

The fourth proportional to 1,097.67, 1,646.81 and 611.07 is: 916.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,097.67 : 1,646.81 = 611.07 : x
  2. Step 2: Convert to fraction form
    1,097.67/1,646.81 = 611.07/x
  3. Step 3: Cross multiply
    1,097.67x = 1,646.81 × 611.07
  4. Step 4: Simplify right side
    1,097.67x = 1,006,316.19
  5. Step 5: Solve for x
    x = 1,006,316.19/1,097.67
  6. Step 6: Final answer
    x = 916.77

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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.