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Finding the Fourth Proportional to 642,709.89, 887,222.18 and 449,874.93

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Solution

The fourth proportional to 642,709.89, 887,222.18 and 449,874.93 is: 621,025.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,709.89 : 887,222.18 = 449,874.93 : x
  2. Step 2: Convert to fraction form
    642,709.89/887,222.18 = 449,874.93/x
  3. Step 3: Cross multiply
    642,709.89x = 887,222.18 × 449,874.93
  4. Step 4: Simplify right side
    642,709.89x = 399,139,020,573.72
  5. Step 5: Solve for x
    x = 399,139,020,573.72/642,709.89
  6. Step 6: Final answer
    x = 621,025.17

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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.