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Finding the Fourth Proportional to 371,447.80, 557,171.70 and 347,828.20

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Solution

The fourth proportional to 371,447.80, 557,171.70 and 347,828.20 is: 521,742.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,447.80 : 557,171.70 = 347,828.20 : x
  2. Step 2: Convert to fraction form
    371,447.80/557,171.70 = 347,828.20/x
  3. Step 3: Cross multiply
    371,447.80x = 557,171.70 × 347,828.20
  4. Step 4: Simplify right side
    371,447.80x = 193,800,029,501.94
  5. Step 5: Solve for x
    x = 193,800,029,501.94/371,447.80
  6. Step 6: Final answer
    x = 521,742.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.