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Finding the Fourth Proportional to 357,939, 493,761.42 and 221,927.04

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Solution

The fourth proportional to 357,939, 493,761.42 and 221,927.04 is: 306,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,939 : 493,761.42 = 221,927.04 : x
  2. Step 2: Convert to fraction form
    357,939/493,761.42 = 221,927.04/x
  3. Step 3: Cross multiply
    357,939x = 493,761.42 × 221,927.04
  4. Step 4: Simplify right side
    357,939x = 109,579,010,406.80
  5. Step 5: Solve for x
    x = 109,579,010,406.80/357,939
  6. Step 6: Final answer
    x = 306,138.78

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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.