Home / 686,041.28-1,029,171-212,628.68

Finding the Fourth Proportional to 686,041.28, 1,029,171 and 212,628.68

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Solution

The fourth proportional to 686,041.28, 1,029,171 and 212,628.68 is: 318,976.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,041.28 : 1,029,171 = 212,628.68 : x
  2. Step 2: Convert to fraction form
    686,041.28/1,029,171 = 212,628.68/x
  3. Step 3: Cross multiply
    686,041.28x = 1,029,171 × 212,628.68
  4. Step 4: Simplify right side
    686,041.28x = 218,831,271,224.28
  5. Step 5: Solve for x
    x = 218,831,271,224.28/686,041.28
  6. Step 6: Final answer
    x = 318,976.83

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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.