Home / 860,289.85-1,290,350.93-261,256.19

Finding the Fourth Proportional to 860,289.85, 1,290,350.93 and 261,256.19

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Solution

The fourth proportional to 860,289.85, 1,290,350.93 and 261,256.19 is: 391,858.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,289.85 : 1,290,350.93 = 261,256.19 : x
  2. Step 2: Convert to fraction form
    860,289.85/1,290,350.93 = 261,256.19/x
  3. Step 3: Cross multiply
    860,289.85x = 1,290,350.93 × 261,256.19
  4. Step 4: Simplify right side
    860,289.85x = 337,112,167,734.76
  5. Step 5: Solve for x
    x = 337,112,167,734.76/860,289.85
  6. Step 6: Final answer
    x = 391,858.82

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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.