Home / 1,206.09-1,664.39-674.98

Finding the Fourth Proportional to 1,206.09, 1,664.39 and 674.98

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Solution

The fourth proportional to 1,206.09, 1,664.39 and 674.98 is: 931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.09 : 1,664.39 = 674.98 : x
  2. Step 2: Convert to fraction form
    1,206.09/1,664.39 = 674.98/x
  3. Step 3: Cross multiply
    1,206.09x = 1,664.39 × 674.98
  4. Step 4: Simplify right side
    1,206.09x = 1,123,427.49
  5. Step 5: Solve for x
    x = 1,123,427.49/1,206.09
  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.