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Finding the Fourth Proportional to 617,446.36, 851,259.18 and 445,220.20

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Solution

The fourth proportional to 617,446.36, 851,259.18 and 445,220.20 is: 613,814.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,446.36 : 851,259.18 = 445,220.20 : x
  2. Step 2: Convert to fraction form
    617,446.36/851,259.18 = 445,220.20/x
  3. Step 3: Cross multiply
    617,446.36x = 851,259.18 × 445,220.20
  4. Step 4: Simplify right side
    617,446.36x = 378,997,782,371.44
  5. Step 5: Solve for x
    x = 378,997,782,371.44/617,446.36
  6. Step 6: Final answer
    x = 613,814.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.