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Finding the Fourth Proportional to 620,589.59, 856,206.41 and 348,619.74

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Solution

The fourth proportional to 620,589.59, 856,206.41 and 348,619.74 is: 480,978.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,589.59 : 856,206.41 = 348,619.74 : x
  2. Step 2: Convert to fraction form
    620,589.59/856,206.41 = 348,619.74/x
  3. Step 3: Cross multiply
    620,589.59x = 856,206.41 × 348,619.74
  4. Step 4: Simplify right side
    620,589.59x = 298,490,456,040.53
  5. Step 5: Solve for x
    x = 298,490,456,040.53/620,589.59
  6. Step 6: Final answer
    x = 480,978.83

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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.