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Finding the Fourth Proportional to 885,805.60, 1,328,708.40 and 412,538.80

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Solution

The fourth proportional to 885,805.60, 1,328,708.40 and 412,538.80 is: 618,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,805.60 : 1,328,708.40 = 412,538.80 : x
  2. Step 2: Convert to fraction form
    885,805.60/1,328,708.40 = 412,538.80/x
  3. Step 3: Cross multiply
    885,805.60x = 1,328,708.40 × 412,538.80
  4. Step 4: Simplify right side
    885,805.60x = 548,143,768,885.92
  5. Step 5: Solve for x
    x = 548,143,768,885.92/885,805.60
  6. Step 6: Final answer
    x = 618,808.20

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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.