Home / 780,013.80-1,076,919.30-637,116.84

Finding the Fourth Proportional to 780,013.80, 1,076,919.30 and 637,116.84

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Solution

The fourth proportional to 780,013.80, 1,076,919.30 and 637,116.84 is: 879,629.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,013.80 : 1,076,919.30 = 637,116.84 : x
  2. Step 2: Convert to fraction form
    780,013.80/1,076,919.30 = 637,116.84/x
  3. Step 3: Cross multiply
    780,013.80x = 1,076,919.30 × 637,116.84
  4. Step 4: Simplify right side
    780,013.80x = 686,123,421,351.01
  5. Step 5: Solve for x
    x = 686,123,421,351.01/780,013.80
  6. Step 6: Final answer
    x = 879,629.85

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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.