Home / 1,277.43-1,916.63-660.74

Finding the Fourth Proportional to 1,277.43, 1,916.63 and 660.74

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Solution

The fourth proportional to 1,277.43, 1,916.63 and 660.74 is: 991.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.43 : 1,916.63 = 660.74 : x
  2. Step 2: Convert to fraction form
    1,277.43/1,916.63 = 660.74/x
  3. Step 3: Cross multiply
    1,277.43x = 1,916.63 × 660.74
  4. Step 4: Simplify right side
    1,277.43x = 1,266,381.22
  5. Step 5: Solve for x
    x = 1,266,381.22/1,277.43
  6. Step 6: Final answer
    x = 991.35

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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.