Home / 1,639.32-2,262.12-931.08

Finding the Fourth Proportional to 1,639.32, 2,262.12 and 931.08

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Solution

The fourth proportional to 1,639.32, 2,262.12 and 931.08 is: 1,284.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.32 : 2,262.12 = 931.08 : x
  2. Step 2: Convert to fraction form
    1,639.32/2,262.12 = 931.08/x
  3. Step 3: Cross multiply
    1,639.32x = 2,262.12 × 931.08
  4. Step 4: Simplify right side
    1,639.32x = 2,106,214.69
  5. Step 5: Solve for x
    x = 2,106,214.69/1,639.32
  6. Step 6: Final answer
    x = 1,284.81

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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.