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Finding the Fourth Proportional to 1,213,808.80, 1,820,713.20 and 835,895.20

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Solution

The fourth proportional to 1,213,808.80, 1,820,713.20 and 835,895.20 is: 1,253,842.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,808.80 : 1,820,713.20 = 835,895.20 : x
  2. Step 2: Convert to fraction form
    1,213,808.80/1,820,713.20 = 835,895.20/x
  3. Step 3: Cross multiply
    1,213,808.80x = 1,820,713.20 × 835,895.20
  4. Step 4: Simplify right side
    1,213,808.80x = 1,521,925,424,456.64
  5. Step 5: Solve for x
    x = 1,521,925,424,456.64/1,213,808.80
  6. Step 6: Final answer
    x = 1,253,842.80

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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.