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Finding the Fourth Proportional to 328,393.92, 492,657.60 and 103,789.44

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Solution

The fourth proportional to 328,393.92, 492,657.60 and 103,789.44 is: 155,705.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,393.92 : 492,657.60 = 103,789.44 : x
  2. Step 2: Convert to fraction form
    328,393.92/492,657.60 = 103,789.44/x
  3. Step 3: Cross multiply
    328,393.92x = 492,657.60 × 103,789.44
  4. Step 4: Simplify right side
    328,393.92x = 51,132,656,415.74
  5. Step 5: Solve for x
    x = 51,132,656,415.74/328,393.92
  6. Step 6: Final answer
    x = 155,705.25

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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.