Home / 811,336.92-1,216,912.43-212,355.90

Finding the Fourth Proportional to 811,336.92, 1,216,912.43 and 212,355.90

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Solution

The fourth proportional to 811,336.92, 1,216,912.43 and 212,355.90 is: 318,509.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,336.92 : 1,216,912.43 = 212,355.90 : x
  2. Step 2: Convert to fraction form
    811,336.92/1,216,912.43 = 212,355.90/x
  3. Step 3: Cross multiply
    811,336.92x = 1,216,912.43 × 212,355.90
  4. Step 4: Simplify right side
    811,336.92x = 258,418,533,232.06
  5. Step 5: Solve for x
    x = 258,418,533,232.06/811,336.92
  6. Step 6: Final answer
    x = 318,509.52

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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.