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Finding the Fourth Proportional to 215,840.40, 298,255.80 and 205,469.88

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Solution

The fourth proportional to 215,840.40, 298,255.80 and 205,469.88 is: 283,925.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,840.40 : 298,255.80 = 205,469.88 : x
  2. Step 2: Convert to fraction form
    215,840.40/298,255.80 = 205,469.88/x
  3. Step 3: Cross multiply
    215,840.40x = 298,255.80 × 205,469.88
  4. Step 4: Simplify right side
    215,840.40x = 61,282,583,435.30
  5. Step 5: Solve for x
    x = 61,282,583,435.30/215,840.40
  6. Step 6: Final answer
    x = 283,925.45

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1.5x scale

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.