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Finding the Fourth Proportional to 686,516.40, 1,029,467.40 and 265,652.40

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Solution

The fourth proportional to 686,516.40, 1,029,467.40 and 265,652.40 is: 398,359.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,516.40 : 1,029,467.40 = 265,652.40 : x
  2. Step 2: Convert to fraction form
    686,516.40/1,029,467.40 = 265,652.40/x
  3. Step 3: Cross multiply
    686,516.40x = 1,029,467.40 × 265,652.40
  4. Step 4: Simplify right side
    686,516.40x = 273,480,485,531.76
  5. Step 5: Solve for x
    x = 273,480,485,531.76/686,516.40
  6. Step 6: Final answer
    x = 398,359.73

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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.