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Finding the Fourth Proportional to 620,428.86, 856,059.02 and 362,188.61

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Solution

The fourth proportional to 620,428.86, 856,059.02 and 362,188.61 is: 499,742.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,428.86 : 856,059.02 = 362,188.61 : x
  2. Step 2: Convert to fraction form
    620,428.86/856,059.02 = 362,188.61/x
  3. Step 3: Cross multiply
    620,428.86x = 856,059.02 × 362,188.61
  4. Step 4: Simplify right side
    620,428.86x = 310,054,821,974.18
  5. Step 5: Solve for x
    x = 310,054,821,974.18/620,428.86
  6. Step 6: Final answer
    x = 499,742.74

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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.