Home / 860,290.80-1,287,811.80-765,812.40

Finding the Fourth Proportional to 860,290.80, 1,287,811.80 and 765,812.40

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Solution

The fourth proportional to 860,290.80, 1,287,811.80 and 765,812.40 is: 1,146,382.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,290.80 : 1,287,811.80 = 765,812.40 : x
  2. Step 2: Convert to fraction form
    860,290.80/1,287,811.80 = 765,812.40/x
  3. Step 3: Cross multiply
    860,290.80x = 1,287,811.80 × 765,812.40
  4. Step 4: Simplify right side
    860,290.80x = 986,222,245,306.32
  5. Step 5: Solve for x
    x = 986,222,245,306.32/860,290.80
  6. Step 6: Final answer
    x = 1,146,382.42

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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.