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Finding the Fourth Proportional to 823,855.40, 1,235,783.10 and 785,364.20

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Solution

The fourth proportional to 823,855.40, 1,235,783.10 and 785,364.20 is: 1,178,046.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,855.40 : 1,235,783.10 = 785,364.20 : x
  2. Step 2: Convert to fraction form
    823,855.40/1,235,783.10 = 785,364.20/x
  3. Step 3: Cross multiply
    823,855.40x = 1,235,783.10 × 785,364.20
  4. Step 4: Simplify right side
    823,855.40x = 970,539,805,705.02
  5. Step 5: Solve for x
    x = 970,539,805,705.02/823,855.40
  6. Step 6: Final answer
    x = 1,178,046.30

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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.