Home / 1,246.18-1,719.73-686.66

Finding the Fourth Proportional to 1,246.18, 1,719.73 and 686.66

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Solution

The fourth proportional to 1,246.18, 1,719.73 and 686.66 is: 947.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.18 : 1,719.73 = 686.66 : x
  2. Step 2: Convert to fraction form
    1,246.18/1,719.73 = 686.66/x
  3. Step 3: Cross multiply
    1,246.18x = 1,719.73 × 686.66
  4. Step 4: Simplify right side
    1,246.18x = 1,180,857.77
  5. Step 5: Solve for x
    x = 1,180,857.77/1,246.18
  6. Step 6: Final answer
    x = 947.58

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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.