Home / 1,280,126.80-1,920,190.20-808,901.20

Finding the Fourth Proportional to 1,280,126.80, 1,920,190.20 and 808,901.20

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Solution

The fourth proportional to 1,280,126.80, 1,920,190.20 and 808,901.20 is: 1,213,351.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,126.80 : 1,920,190.20 = 808,901.20 : x
  2. Step 2: Convert to fraction form
    1,280,126.80/1,920,190.20 = 808,901.20/x
  3. Step 3: Cross multiply
    1,280,126.80x = 1,920,190.20 × 808,901.20
  4. Step 4: Simplify right side
    1,280,126.80x = 1,553,244,157,008.24
  5. Step 5: Solve for x
    x = 1,553,244,157,008.24/1,280,126.80
  6. Step 6: Final answer
    x = 1,213,351.80

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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.