Home / 813,639.74-1,220,320.18-214,606.77

Finding the Fourth Proportional to 813,639.74, 1,220,320.18 and 214,606.77

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Solution

The fourth proportional to 813,639.74, 1,220,320.18 and 214,606.77 is: 321,873.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,639.74 : 1,220,320.18 = 214,606.77 : x
  2. Step 2: Convert to fraction form
    813,639.74/1,220,320.18 = 214,606.77/x
  3. Step 3: Cross multiply
    813,639.74x = 1,220,320.18 × 214,606.77
  4. Step 4: Simplify right side
    813,639.74x = 261,888,967,887.68
  5. Step 5: Solve for x
    x = 261,888,967,887.68/813,639.74
  6. Step 6: Final answer
    x = 321,873.38

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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.