Home / 780,121.53-1,076,589.02-440,589.78

Finding the Fourth Proportional to 780,121.53, 1,076,589.02 and 440,589.78

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Solution

The fourth proportional to 780,121.53, 1,076,589.02 and 440,589.78 is: 608,025.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,121.53 : 1,076,589.02 = 440,589.78 : x
  2. Step 2: Convert to fraction form
    780,121.53/1,076,589.02 = 440,589.78/x
  3. Step 3: Cross multiply
    780,121.53x = 1,076,589.02 × 440,589.78
  4. Step 4: Simplify right side
    780,121.53x = 474,334,120,573.69
  5. Step 5: Solve for x
    x = 474,334,120,573.69/780,121.53
  6. Step 6: Final answer
    x = 608,025.93

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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.