Home / 813,121.66-1,219,685.16-205,909.64

Finding the Fourth Proportional to 813,121.66, 1,219,685.16 and 205,909.64

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Solution

The fourth proportional to 813,121.66, 1,219,685.16 and 205,909.64 is: 308,865.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,121.66 : 1,219,685.16 = 205,909.64 : x
  2. Step 2: Convert to fraction form
    813,121.66/1,219,685.16 = 205,909.64/x
  3. Step 3: Cross multiply
    813,121.66x = 1,219,685.16 × 205,909.64
  4. Step 4: Simplify right side
    813,121.66x = 251,144,926,110.52
  5. Step 5: Solve for x
    x = 251,144,926,110.52/813,121.66
  6. Step 6: Final answer
    x = 308,865.13

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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.