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Finding the Fourth Proportional to 274,702.12, 379,070.87 and 153,815.69

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Solution

The fourth proportional to 274,702.12, 379,070.87 and 153,815.69 is: 212,255.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,702.12 : 379,070.87 = 153,815.69 : x
  2. Step 2: Convert to fraction form
    274,702.12/379,070.87 = 153,815.69/x
  3. Step 3: Cross multiply
    274,702.12x = 379,070.87 × 153,815.69
  4. Step 4: Simplify right side
    274,702.12x = 58,307,047,427.95
  5. Step 5: Solve for x
    x = 58,307,047,427.95/274,702.12
  6. Step 6: Final answer
    x = 212,255.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.