Home / 686,121.20-1,029,181.80-286,629.20

Finding the Fourth Proportional to 686,121.20, 1,029,181.80 and 286,629.20

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Solution

The fourth proportional to 686,121.20, 1,029,181.80 and 286,629.20 is: 429,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,121.20 : 1,029,181.80 = 286,629.20 : x
  2. Step 2: Convert to fraction form
    686,121.20/1,029,181.80 = 286,629.20/x
  3. Step 3: Cross multiply
    686,121.20x = 1,029,181.80 × 286,629.20
  4. Step 4: Simplify right side
    686,121.20x = 294,993,555,988.56
  5. Step 5: Solve for x
    x = 294,993,555,988.56/686,121.20
  6. Step 6: Final answer
    x = 429,943.80

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1.5x scale

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.