Home / 811,209.96-1,216,721.98-212,228.92

Finding the Fourth Proportional to 811,209.96, 1,216,721.98 and 212,228.92

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Solution

The fourth proportional to 811,209.96, 1,216,721.98 and 212,228.92 is: 318,319.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,209.96 : 1,216,721.98 = 212,228.92 : x
  2. Step 2: Convert to fraction form
    811,209.96/1,216,721.98 = 212,228.92/x
  3. Step 3: Cross multiply
    811,209.96x = 1,216,721.98 × 212,228.92
  4. Step 4: Simplify right side
    811,209.96x = 258,223,591,755.66
  5. Step 5: Solve for x
    x = 258,223,591,755.66/811,209.96
  6. Step 6: Final answer
    x = 318,319.06

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1.5x scale

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.