Home / 654,121.20-981,181.80-430,172.40

Finding the Fourth Proportional to 654,121.20, 981,181.80 and 430,172.40

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Solution

The fourth proportional to 654,121.20, 981,181.80 and 430,172.40 is: 645,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,121.20 : 981,181.80 = 430,172.40 : x
  2. Step 2: Convert to fraction form
    654,121.20/981,181.80 = 430,172.40/x
  3. Step 3: Cross multiply
    654,121.20x = 981,181.80 × 430,172.40
  4. Step 4: Simplify right side
    654,121.20x = 422,077,329,742.32
  5. Step 5: Solve for x
    x = 422,077,329,742.32/654,121.20
  6. Step 6: Final answer
    x = 645,258.60

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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.