Home / 678,970.08-1,016,997.16-639,222.68

Finding the Fourth Proportional to 678,970.08, 1,016,997.16 and 639,222.68

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Solution

The fourth proportional to 678,970.08, 1,016,997.16 and 639,222.68 is: 957,461.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,970.08 : 1,016,997.16 = 639,222.68 : x
  2. Step 2: Convert to fraction form
    678,970.08/1,016,997.16 = 639,222.68/x
  3. Step 3: Cross multiply
    678,970.08x = 1,016,997.16 × 639,222.68
  4. Step 4: Simplify right side
    678,970.08x = 650,087,650,167.59
  5. Step 5: Solve for x
    x = 650,087,650,167.59/678,970.08
  6. Step 6: Final answer
    x = 957,461.41

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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.