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Finding the Fourth Proportional to 860,308.80, 1,292,329.44 and 828,816

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Solution

The fourth proportional to 860,308.80, 1,292,329.44 and 828,816 is: 1,245,021.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,308.80 : 1,292,329.44 = 828,816 : x
  2. Step 2: Convert to fraction form
    860,308.80/1,292,329.44 = 828,816/x
  3. Step 3: Cross multiply
    860,308.80x = 1,292,329.44 × 828,816
  4. Step 4: Simplify right side
    860,308.80x = 1,071,103,317,143.04
  5. Step 5: Solve for x
    x = 1,071,103,317,143.04/860,308.80
  6. Step 6: Final answer
    x = 1,245,021.92

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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.