Home / 1,287,467.42-1,931,201.12-686,608.20

Finding the Fourth Proportional to 1,287,467.42, 1,931,201.12 and 686,608.20

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Solution

The fourth proportional to 1,287,467.42, 1,931,201.12 and 686,608.20 is: 1,029,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,467.42 : 1,931,201.12 = 686,608.20 : x
  2. Step 2: Convert to fraction form
    1,287,467.42/1,931,201.12 = 686,608.20/x
  3. Step 3: Cross multiply
    1,287,467.42x = 1,931,201.12 × 686,608.20
  4. Step 4: Simplify right side
    1,287,467.42x = 1,325,978,526,557.70
  5. Step 5: Solve for x
    x = 1,325,978,526,557.70/1,287,467.42
  6. Step 6: Final answer
    x = 1,029,912.30

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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.