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Finding the Fourth Proportional to 885,647.80, 1,328,471.70 and 812,164.60

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Solution

The fourth proportional to 885,647.80, 1,328,471.70 and 812,164.60 is: 1,218,246.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,647.80 : 1,328,471.70 = 812,164.60 : x
  2. Step 2: Convert to fraction form
    885,647.80/1,328,471.70 = 812,164.60/x
  3. Step 3: Cross multiply
    885,647.80x = 1,328,471.70 × 812,164.60
  4. Step 4: Simplify right side
    885,647.80x = 1,078,937,686,841.82
  5. Step 5: Solve for x
    x = 1,078,937,686,841.82/885,647.80
  6. Step 6: Final answer
    x = 1,218,246.90

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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.