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Finding the Fourth Proportional to 621,690.22, 931,300.68 and 479,040.58

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Solution

The fourth proportional to 621,690.22, 931,300.68 and 479,040.58 is: 717,609.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,690.22 : 931,300.68 = 479,040.58 : x
  2. Step 2: Convert to fraction form
    621,690.22/931,300.68 = 479,040.58/x
  3. Step 3: Cross multiply
    621,690.22x = 931,300.68 × 479,040.58
  4. Step 4: Simplify right side
    621,690.22x = 446,130,817,901.59
  5. Step 5: Solve for x
    x = 446,130,817,901.59/621,690.22
  6. Step 6: Final answer
    x = 717,609.52

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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.