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Finding the Fourth Proportional to 1,892,807.20, 2,839,210.80 and 1,359,200.80

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Solution

The fourth proportional to 1,892,807.20, 2,839,210.80 and 1,359,200.80 is: 2,038,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,892,807.20 : 2,839,210.80 = 1,359,200.80 : x
  2. Step 2: Convert to fraction form
    1,892,807.20/2,839,210.80 = 1,359,200.80/x
  3. Step 3: Cross multiply
    1,892,807.20x = 2,839,210.80 × 1,359,200.80
  4. Step 4: Simplify right side
    1,892,807.20x = 3,859,057,590,728.64
  5. Step 5: Solve for x
    x = 3,859,057,590,728.64/1,892,807.20
  6. Step 6: Final answer
    x = 2,038,801.20

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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.