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Finding the Fourth Proportional to 512,085.80, 768,128.70 and 325,231.40

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Solution

The fourth proportional to 512,085.80, 768,128.70 and 325,231.40 is: 487,847.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,085.80 : 768,128.70 = 325,231.40 : x
  2. Step 2: Convert to fraction form
    512,085.80/768,128.70 = 325,231.40/x
  3. Step 3: Cross multiply
    512,085.80x = 768,128.70 × 325,231.40
  4. Step 4: Simplify right side
    512,085.80x = 249,819,572,481.18
  5. Step 5: Solve for x
    x = 249,819,572,481.18/512,085.80
  6. Step 6: Final answer
    x = 487,847.10

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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.