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Finding the Fourth Proportional to 579,299.85, 868,149.90 and 418,090.61

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Solution

The fourth proportional to 579,299.85, 868,149.90 and 418,090.61 is: 626,558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,299.85 : 868,149.90 = 418,090.61 : x
  2. Step 2: Convert to fraction form
    579,299.85/868,149.90 = 418,090.61/x
  3. Step 3: Cross multiply
    579,299.85x = 868,149.90 × 418,090.61
  4. Step 4: Simplify right side
    579,299.85x = 362,965,323,432.81
  5. Step 5: Solve for x
    x = 362,965,323,432.81/579,299.85
  6. Step 6: Final answer
    x = 626,558.64

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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.