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Finding the Fourth Proportional to 628,702.38, 943,053.87 and 207,978.26

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Solution

The fourth proportional to 628,702.38, 943,053.87 and 207,978.26 is: 311,967.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,702.38 : 943,053.87 = 207,978.26 : x
  2. Step 2: Convert to fraction form
    628,702.38/943,053.87 = 207,978.26/x
  3. Step 3: Cross multiply
    628,702.38x = 943,053.87 × 207,978.26
  4. Step 4: Simplify right side
    628,702.38x = 196,134,699,033.52
  5. Step 5: Solve for x
    x = 196,134,699,033.52/628,702.38
  6. Step 6: Final answer
    x = 311,967.48

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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.