Home / 1,246.06-1,719.56-686.51

Finding the Fourth Proportional to 1,246.06, 1,719.56 and 686.51

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Solution

The fourth proportional to 1,246.06, 1,719.56 and 686.51 is: 947.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.06 : 1,719.56 = 686.51 : x
  2. Step 2: Convert to fraction form
    1,246.06/1,719.56 = 686.51/x
  3. Step 3: Cross multiply
    1,246.06x = 1,719.56 × 686.51
  4. Step 4: Simplify right side
    1,246.06x = 1,180,491.70
  5. Step 5: Solve for x
    x = 1,180,491.70/1,246.06
  6. Step 6: Final answer
    x = 947.38

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1.5x scale

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.