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Finding the Fourth Proportional to 219,485.52, 328,979.40 and 100,912.08

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Solution

The fourth proportional to 219,485.52, 328,979.40 and 100,912.08 is: 151,253.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,485.52 : 328,979.40 = 100,912.08 : x
  2. Step 2: Convert to fraction form
    219,485.52/328,979.40 = 100,912.08/x
  3. Step 3: Cross multiply
    219,485.52x = 328,979.40 × 100,912.08
  4. Step 4: Simplify right side
    219,485.52x = 33,197,995,531.15
  5. Step 5: Solve for x
    x = 33,197,995,531.15/219,485.52
  6. Step 6: Final answer
    x = 151,253.69

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1.5x scale

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.