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Finding the Fourth Proportional to 279,702.68, 385,999.62 and 158,840.60

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Solution

The fourth proportional to 279,702.68, 385,999.62 and 158,840.60 is: 219,205.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,702.68 : 385,999.62 = 158,840.60 : x
  2. Step 2: Convert to fraction form
    279,702.68/385,999.62 = 158,840.60/x
  3. Step 3: Cross multiply
    279,702.68x = 385,999.62 × 158,840.60
  4. Step 4: Simplify right side
    279,702.68x = 61,312,411,240.57
  5. Step 5: Solve for x
    x = 61,312,411,240.57/279,702.68
  6. Step 6: Final answer
    x = 219,205.66

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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.