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Finding the Fourth Proportional to 554,621.46, 765,359.96 and 312,900.80

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Solution

The fourth proportional to 554,621.46, 765,359.96 and 312,900.80 is: 431,793.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,621.46 : 765,359.96 = 312,900.80 : x
  2. Step 2: Convert to fraction form
    554,621.46/765,359.96 = 312,900.80/x
  3. Step 3: Cross multiply
    554,621.46x = 765,359.96 × 312,900.80
  4. Step 4: Simplify right side
    554,621.46x = 239,481,743,771.97
  5. Step 5: Solve for x
    x = 239,481,743,771.97/554,621.46
  6. Step 6: Final answer
    x = 431,793.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.