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Finding the Fourth Proportional to 620,237.30, 856,020.02 and 378,659.93

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Solution

The fourth proportional to 620,237.30, 856,020.02 and 378,659.93 is: 522,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,237.30 : 856,020.02 = 378,659.93 : x
  2. Step 2: Convert to fraction form
    620,237.30/856,020.02 = 378,659.93/x
  3. Step 3: Cross multiply
    620,237.30x = 856,020.02 × 378,659.93
  4. Step 4: Simplify right side
    620,237.30x = 324,140,474,678.40
  5. Step 5: Solve for x
    x = 324,140,474,678.40/620,237.30
  6. Step 6: Final answer
    x = 522,607.20

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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.