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Finding the Fourth Proportional to 860,309.80, 1,292,330.94 and 828,817

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Solution

The fourth proportional to 860,309.80, 1,292,330.94 and 828,817 is: 1,245,023.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,309.80 : 1,292,330.94 = 828,817 : x
  2. Step 2: Convert to fraction form
    860,309.80/1,292,330.94 = 828,817/x
  3. Step 3: Cross multiply
    860,309.80x = 1,292,330.94 × 828,817
  4. Step 4: Simplify right side
    860,309.80x = 1,071,105,852,697.98
  5. Step 5: Solve for x
    x = 1,071,105,852,697.98/860,309.80
  6. Step 6: Final answer
    x = 1,245,023.42

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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.