Home / 680,800.12-1,019,981.94-380,931.64

Finding the Fourth Proportional to 680,800.12, 1,019,981.94 and 380,931.64

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Solution

The fourth proportional to 680,800.12, 1,019,981.94 and 380,931.64 is: 570,715.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,800.12 : 1,019,981.94 = 380,931.64 : x
  2. Step 2: Convert to fraction form
    680,800.12/1,019,981.94 = 380,931.64/x
  3. Step 3: Cross multiply
    680,800.12x = 1,019,981.94 × 380,931.64
  4. Step 4: Simplify right side
    680,800.12x = 388,543,393,174.58
  5. Step 5: Solve for x
    x = 388,543,393,174.58/680,800.12
  6. Step 6: Final answer
    x = 570,715.81

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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.