Home / 431,332.80-646,999.20-115,821.60

Finding the Fourth Proportional to 431,332.80, 646,999.20 and 115,821.60

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Solution

The fourth proportional to 431,332.80, 646,999.20 and 115,821.60 is: 173,732.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,332.80 : 646,999.20 = 115,821.60 : x
  2. Step 2: Convert to fraction form
    431,332.80/646,999.20 = 115,821.60/x
  3. Step 3: Cross multiply
    431,332.80x = 646,999.20 × 115,821.60
  4. Step 4: Simplify right side
    431,332.80x = 74,936,482,542.72
  5. Step 5: Solve for x
    x = 74,936,482,542.72/431,332.80
  6. Step 6: Final answer
    x = 173,732.40

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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.