Home / 813,208.78-1,122,238.47-450,639.73

Finding the Fourth Proportional to 813,208.78, 1,122,238.47 and 450,639.73

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Solution

The fourth proportional to 813,208.78, 1,122,238.47 and 450,639.73 is: 621,888.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,208.78 : 1,122,238.47 = 450,639.73 : x
  2. Step 2: Convert to fraction form
    813,208.78/1,122,238.47 = 450,639.73/x
  3. Step 3: Cross multiply
    813,208.78x = 1,122,238.47 × 450,639.73
  4. Step 4: Simplify right side
    813,208.78x = 505,725,241,116.41
  5. Step 5: Solve for x
    x = 505,725,241,116.41/813,208.78
  6. Step 6: Final answer
    x = 621,888.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.