Home / 1,206.42-1,664.78-675.21

Finding the Fourth Proportional to 1,206.42, 1,664.78 and 675.21

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Solution

The fourth proportional to 1,206.42, 1,664.78 and 675.21 is: 931.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.42 : 1,664.78 = 675.21 : x
  2. Step 2: Convert to fraction form
    1,206.42/1,664.78 = 675.21/x
  3. Step 3: Cross multiply
    1,206.42x = 1,664.78 × 675.21
  4. Step 4: Simplify right side
    1,206.42x = 1,124,076.10
  5. Step 5: Solve for x
    x = 1,124,076.10/1,206.42
  6. Step 6: Final answer
    x = 931.75

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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.