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Finding the Fourth Proportional to 1,916.59, 2,644.81 and 1,065.81

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Solution

The fourth proportional to 1,916.59, 2,644.81 and 1,065.81 is: 1,470.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.59 : 2,644.81 = 1,065.81 : x
  2. Step 2: Convert to fraction form
    1,916.59/2,644.81 = 1,065.81/x
  3. Step 3: Cross multiply
    1,916.59x = 2,644.81 × 1,065.81
  4. Step 4: Simplify right side
    1,916.59x = 2,818,864.95
  5. Step 5: Solve for x
    x = 2,818,864.95/1,916.59
  6. Step 6: Final answer
    x = 1,470.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.