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Finding the Fourth Proportional to 876,009.70, 1,314,014.55 and 515,810.80

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Solution

The fourth proportional to 876,009.70, 1,314,014.55 and 515,810.80 is: 773,716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,009.70 : 1,314,014.55 = 515,810.80 : x
  2. Step 2: Convert to fraction form
    876,009.70/1,314,014.55 = 515,810.80/x
  3. Step 3: Cross multiply
    876,009.70x = 1,314,014.55 × 515,810.80
  4. Step 4: Simplify right side
    876,009.70x = 677,782,896,247.14
  5. Step 5: Solve for x
    x = 677,782,896,247.14/876,009.70
  6. Step 6: Final answer
    x = 773,716.20

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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.