Home / 860,290.85-1,290,352.43-261,257.19

Finding the Fourth Proportional to 860,290.85, 1,290,352.43 and 261,257.19

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Solution

The fourth proportional to 860,290.85, 1,290,352.43 and 261,257.19 is: 391,860.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,290.85 : 1,290,352.43 = 261,257.19 : x
  2. Step 2: Convert to fraction form
    860,290.85/1,290,352.43 = 261,257.19/x
  3. Step 3: Cross multiply
    860,290.85x = 1,290,352.43 × 261,257.19
  4. Step 4: Simplify right side
    860,290.85x = 337,113,849,971.47
  5. Step 5: Solve for x
    x = 337,113,849,971.47/860,290.85
  6. Step 6: Final answer
    x = 391,860.32

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Double scale
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1.5x scale

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.