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Finding the Fourth Proportional to 431,274.40, 646,911.60 and 325,520.80

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Solution

The fourth proportional to 431,274.40, 646,911.60 and 325,520.80 is: 488,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,274.40 : 646,911.60 = 325,520.80 : x
  2. Step 2: Convert to fraction form
    431,274.40/646,911.60 = 325,520.80/x
  3. Step 3: Cross multiply
    431,274.40x = 646,911.60 × 325,520.80
  4. Step 4: Simplify right side
    431,274.40x = 210,583,181,561.28
  5. Step 5: Solve for x
    x = 210,583,181,561.28/431,274.40
  6. Step 6: Final answer
    x = 488,281.20

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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.