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Finding the Fourth Proportional to 1,316.66, 1,971.15 and 1,266.74

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Solution

The fourth proportional to 1,316.66, 1,971.15 and 1,266.74 is: 1,896.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.66 : 1,971.15 = 1,266.74 : x
  2. Step 2: Convert to fraction form
    1,316.66/1,971.15 = 1,266.74/x
  3. Step 3: Cross multiply
    1,316.66x = 1,971.15 × 1,266.74
  4. Step 4: Simplify right side
    1,316.66x = 2,496,934.55
  5. Step 5: Solve for x
    x = 2,496,934.55/1,316.66
  6. Step 6: Final answer
    x = 1,896.42

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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.