Home / 1,638,123.80-2,457,185.70-1,617,128.60

Finding the Fourth Proportional to 1,638,123.80, 2,457,185.70 and 1,617,128.60

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Solution

The fourth proportional to 1,638,123.80, 2,457,185.70 and 1,617,128.60 is: 2,425,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638,123.80 : 2,457,185.70 = 1,617,128.60 : x
  2. Step 2: Convert to fraction form
    1,638,123.80/2,457,185.70 = 1,617,128.60/x
  3. Step 3: Cross multiply
    1,638,123.80x = 2,457,185.70 × 1,617,128.60
  4. Step 4: Simplify right side
    1,638,123.80x = 3,973,585,270,981.02
  5. Step 5: Solve for x
    x = 3,973,585,270,981.02/1,638,123.80
  6. Step 6: Final answer
    x = 2,425,692.90

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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.