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Finding the Fourth Proportional to 885,902.60, 1,328,853.90 and 728,438.60

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Solution

The fourth proportional to 885,902.60, 1,328,853.90 and 728,438.60 is: 1,092,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,902.60 : 1,328,853.90 = 728,438.60 : x
  2. Step 2: Convert to fraction form
    885,902.60/1,328,853.90 = 728,438.60/x
  3. Step 3: Cross multiply
    885,902.60x = 1,328,853.90 × 728,438.60
  4. Step 4: Simplify right side
    885,902.60x = 967,988,474,520.54
  5. Step 5: Solve for x
    x = 967,988,474,520.54/885,902.60
  6. Step 6: Final answer
    x = 1,092,657.90

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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.