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Finding the Fourth Proportional to 512,040.80, 768,061.20 and 325,186.40

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Solution

The fourth proportional to 512,040.80, 768,061.20 and 325,186.40 is: 487,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,040.80 : 768,061.20 = 325,186.40 : x
  2. Step 2: Convert to fraction form
    512,040.80/768,061.20 = 325,186.40/x
  3. Step 3: Cross multiply
    512,040.80x = 768,061.20 × 325,186.40
  4. Step 4: Simplify right side
    512,040.80x = 249,763,056,607.68
  5. Step 5: Solve for x
    x = 249,763,056,607.68/512,040.80
  6. Step 6: Final answer
    x = 487,779.60

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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.