Home / 813,719.08-1,220,439.28-214,686.40

Finding the Fourth Proportional to 813,719.08, 1,220,439.28 and 214,686.40

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Solution

The fourth proportional to 813,719.08, 1,220,439.28 and 214,686.40 is: 321,992.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,719.08 : 1,220,439.28 = 214,686.40 : x
  2. Step 2: Convert to fraction form
    813,719.08/1,220,439.28 = 214,686.40/x
  3. Step 3: Cross multiply
    813,719.08x = 1,220,439.28 × 214,686.40
  4. Step 4: Simplify right side
    813,719.08x = 262,011,715,441.79
  5. Step 5: Solve for x
    x = 262,011,715,441.79/813,719.08
  6. Step 6: Final answer
    x = 321,992.84

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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.