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Finding the Fourth Proportional to 1,212,933.90, 1,819,400.85 and 835,020.30

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Solution

The fourth proportional to 1,212,933.90, 1,819,400.85 and 835,020.30 is: 1,252,530.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,933.90 : 1,819,400.85 = 835,020.30 : x
  2. Step 2: Convert to fraction form
    1,212,933.90/1,819,400.85 = 835,020.30/x
  3. Step 3: Cross multiply
    1,212,933.90x = 1,819,400.85 × 835,020.30
  4. Step 4: Simplify right side
    1,212,933.90x = 1,519,236,643,587.26
  5. Step 5: Solve for x
    x = 1,519,236,643,587.26/1,212,933.90
  6. Step 6: Final answer
    x = 1,252,530.45

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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.