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Finding the Fourth Proportional to 438,078.70, 657,139.65 and 228,126.70

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Solution

The fourth proportional to 438,078.70, 657,139.65 and 228,126.70 is: 342,201.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,078.70 : 657,139.65 = 228,126.70 : x
  2. Step 2: Convert to fraction form
    438,078.70/657,139.65 = 228,126.70/x
  3. Step 3: Cross multiply
    438,078.70x = 657,139.65 × 228,126.70
  4. Step 4: Simplify right side
    438,078.70x = 149,911,099,793.66
  5. Step 5: Solve for x
    x = 149,911,099,793.66/438,078.70
  6. Step 6: Final answer
    x = 342,201.30

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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.