Home / 1,120,686.81-1,680,849.77-321,786.64

Finding the Fourth Proportional to 1,120,686.81, 1,680,849.77 and 321,786.64

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Solution

The fourth proportional to 1,120,686.81, 1,680,849.77 and 321,786.64 is: 482,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,686.81 : 1,680,849.77 = 321,786.64 : x
  2. Step 2: Convert to fraction form
    1,120,686.81/1,680,849.77 = 321,786.64/x
  3. Step 3: Cross multiply
    1,120,686.81x = 1,680,849.77 × 321,786.64
  4. Step 4: Simplify right side
    1,120,686.81x = 540,875,000,325.20
  5. Step 5: Solve for x
    x = 540,875,000,325.20/1,120,686.81
  6. Step 6: Final answer
    x = 482,628.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.