Home / 780,012.80-1,076,917.92-637,115.84

Finding the Fourth Proportional to 780,012.80, 1,076,917.92 and 637,115.84

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Solution

The fourth proportional to 780,012.80, 1,076,917.92 and 637,115.84 is: 879,628.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,012.80 : 1,076,917.92 = 637,115.84 : x
  2. Step 2: Convert to fraction form
    780,012.80/1,076,917.92 = 637,115.84/x
  3. Step 3: Cross multiply
    780,012.80x = 1,076,917.92 × 637,115.84
  4. Step 4: Simplify right side
    780,012.80x = 686,121,465,211.85
  5. Step 5: Solve for x
    x = 686,121,465,211.85/780,012.80
  6. Step 6: Final answer
    x = 879,628.47

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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.