Home / 1,206.10-1,664.38-674.99

Finding the Fourth Proportional to 1,206.10, 1,664.38 and 674.99

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Solution

The fourth proportional to 1,206.10, 1,664.38 and 674.99 is: 931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.10 : 1,664.38 = 674.99 : x
  2. Step 2: Convert to fraction form
    1,206.10/1,664.38 = 674.99/x
  3. Step 3: Cross multiply
    1,206.10x = 1,664.38 × 674.99
  4. Step 4: Simplify right side
    1,206.10x = 1,123,431.53
  5. Step 5: Solve for x
    x = 1,123,431.53/1,206.10
  6. Step 6: Final answer
    x = 931.46

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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.