Home / 1,275,998.40-1,913,997.60-644,830.20

Finding the Fourth Proportional to 1,275,998.40, 1,913,997.60 and 644,830.20

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Solution

The fourth proportional to 1,275,998.40, 1,913,997.60 and 644,830.20 is: 967,245.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275,998.40 : 1,913,997.60 = 644,830.20 : x
  2. Step 2: Convert to fraction form
    1,275,998.40/1,913,997.60 = 644,830.20/x
  3. Step 3: Cross multiply
    1,275,998.40x = 1,913,997.60 × 644,830.20
  4. Step 4: Simplify right side
    1,275,998.40x = 1,234,203,455,207.52
  5. Step 5: Solve for x
    x = 1,234,203,455,207.52/1,275,998.40
  6. Step 6: Final answer
    x = 967,245.30

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1.5x scale

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.