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Finding the Fourth Proportional to 620,225.91, 856,005.44 and 378,649.35

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Solution

The fourth proportional to 620,225.91, 856,005.44 and 378,649.35 is: 522,593.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,225.91 : 856,005.44 = 378,649.35 : x
  2. Step 2: Convert to fraction form
    620,225.91/856,005.44 = 378,649.35/x
  3. Step 3: Cross multiply
    620,225.91x = 856,005.44 × 378,649.35
  4. Step 4: Simplify right side
    620,225.91x = 324,125,901,559.22
  5. Step 5: Solve for x
    x = 324,125,901,559.22/620,225.91
  6. Step 6: Final answer
    x = 522,593.29

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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.