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Finding the Fourth Proportional to 874,978.71, 1,313,891.99 and 540,147.80

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Solution

The fourth proportional to 874,978.71, 1,313,891.99 and 540,147.80 is: 811,100.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,978.71 : 1,313,891.99 = 540,147.80 : x
  2. Step 2: Convert to fraction form
    874,978.71/1,313,891.99 = 540,147.80/x
  3. Step 3: Cross multiply
    874,978.71x = 1,313,891.99 × 540,147.80
  4. Step 4: Simplify right side
    874,978.71x = 709,695,870,445.67
  5. Step 5: Solve for x
    x = 709,695,870,445.67/874,978.71
  6. Step 6: Final answer
    x = 811,100.73

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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.