Home / 812,720.21-1,219,160.49-280,171.13

Finding the Fourth Proportional to 812,720.21, 1,219,160.49 and 280,171.13

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Solution

The fourth proportional to 812,720.21, 1,219,160.49 and 280,171.13 is: 420,284.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,720.21 : 1,219,160.49 = 280,171.13 : x
  2. Step 2: Convert to fraction form
    812,720.21/1,219,160.49 = 280,171.13/x
  3. Step 3: Cross multiply
    812,720.21x = 1,219,160.49 × 280,171.13
  4. Step 4: Simplify right side
    812,720.21x = 341,573,566,038.85
  5. Step 5: Solve for x
    x = 341,573,566,038.85/812,720.21
  6. Step 6: Final answer
    x = 420,284.33

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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.