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Finding the Fourth Proportional to 485,475.62, 670,243.40 and 431,611.56

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Solution

The fourth proportional to 485,475.62, 670,243.40 and 431,611.56 is: 595,879.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,475.62 : 670,243.40 = 431,611.56 : x
  2. Step 2: Convert to fraction form
    485,475.62/670,243.40 = 431,611.56/x
  3. Step 3: Cross multiply
    485,475.62x = 670,243.40 × 431,611.56
  4. Step 4: Simplify right side
    485,475.62x = 289,284,797,295.65
  5. Step 5: Solve for x
    x = 289,284,797,295.65/485,475.62
  6. Step 6: Final answer
    x = 595,879.15

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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.