Home / 680,865.40-1,021,298.10-442,919.80

Finding the Fourth Proportional to 680,865.40, 1,021,298.10 and 442,919.80

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Solution

The fourth proportional to 680,865.40, 1,021,298.10 and 442,919.80 is: 664,379.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,865.40 : 1,021,298.10 = 442,919.80 : x
  2. Step 2: Convert to fraction form
    680,865.40/1,021,298.10 = 442,919.80/x
  3. Step 3: Cross multiply
    680,865.40x = 1,021,298.10 × 442,919.80
  4. Step 4: Simplify right side
    680,865.40x = 452,353,150,192.38
  5. Step 5: Solve for x
    x = 452,353,150,192.38/680,865.40
  6. Step 6: Final answer
    x = 664,379.70

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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.