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Finding the Fourth Proportional to 485,515.65, 728,272.26 and 130,529.64

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Solution

The fourth proportional to 485,515.65, 728,272.26 and 130,529.64 is: 195,794.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,515.65 : 728,272.26 = 130,529.64 : x
  2. Step 2: Convert to fraction form
    485,515.65/728,272.26 = 130,529.64/x
  3. Step 3: Cross multiply
    485,515.65x = 728,272.26 × 130,529.64
  4. Step 4: Simplify right side
    485,515.65x = 95,061,115,919.79
  5. Step 5: Solve for x
    x = 95,061,115,919.79/485,515.65
  6. Step 6: Final answer
    x = 195,794.13

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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.