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Finding the Fourth Proportional to 408,856.51, 613,310.73 and 128,384.83

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Solution

The fourth proportional to 408,856.51, 613,310.73 and 128,384.83 is: 192,585.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,856.51 : 613,310.73 = 128,384.83 : x
  2. Step 2: Convert to fraction form
    408,856.51/613,310.73 = 128,384.83/x
  3. Step 3: Cross multiply
    408,856.51x = 613,310.73 × 128,384.83
  4. Step 4: Simplify right side
    408,856.51x = 78,739,793,808.23
  5. Step 5: Solve for x
    x = 78,739,793,808.23/408,856.51
  6. Step 6: Final answer
    x = 192,585.40

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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.