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Finding the Fourth Proportional to 621,689.22, 931,299.18 and 479,039.58

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Solution

The fourth proportional to 621,689.22, 931,299.18 and 479,039.58 is: 717,608.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,689.22 : 931,299.18 = 479,039.58 : x
  2. Step 2: Convert to fraction form
    621,689.22/931,299.18 = 479,039.58/x
  3. Step 3: Cross multiply
    621,689.22x = 931,299.18 × 479,039.58
  4. Step 4: Simplify right side
    621,689.22x = 446,129,168,041.54
  5. Step 5: Solve for x
    x = 446,129,168,041.54/621,689.22
  6. Step 6: Final answer
    x = 717,608.02

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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.