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Finding the Fourth Proportional to 620,238.30, 856,021.40 and 378,660.93

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Solution

The fourth proportional to 620,238.30, 856,021.40 and 378,660.93 is: 522,608.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,238.30 : 856,021.40 = 378,660.93 : x
  2. Step 2: Convert to fraction form
    620,238.30/856,021.40 = 378,660.93/x
  3. Step 3: Cross multiply
    620,238.30x = 856,021.40 × 378,660.93
  4. Step 4: Simplify right side
    620,238.30x = 324,141,859,423.90
  5. Step 5: Solve for x
    x = 324,141,859,423.90/620,238.30
  6. Step 6: Final answer
    x = 522,608.58

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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.