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Finding the Fourth Proportional to 372,622, 514,347.96 and 221,715.76

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Solution

The fourth proportional to 372,622, 514,347.96 and 221,715.76 is: 306,044.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,622 : 514,347.96 = 221,715.76 : x
  2. Step 2: Convert to fraction form
    372,622/514,347.96 = 221,715.76/x
  3. Step 3: Cross multiply
    372,622x = 514,347.96 × 221,715.76
  4. Step 4: Simplify right side
    372,622x = 114,039,048,855.85
  5. Step 5: Solve for x
    x = 114,039,048,855.85/372,622
  6. Step 6: Final answer
    x = 306,044.86

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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.