Home / 860,210.78-1,290,366.39-261,191.48

Finding the Fourth Proportional to 860,210.78, 1,290,366.39 and 261,191.48

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Solution

The fourth proportional to 860,210.78, 1,290,366.39 and 261,191.48 is: 391,802.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,210.78 : 1,290,366.39 = 261,191.48 : x
  2. Step 2: Convert to fraction form
    860,210.78/1,290,366.39 = 261,191.48/x
  3. Step 3: Cross multiply
    860,210.78x = 1,290,366.39 × 261,191.48
  4. Step 4: Simplify right side
    860,210.78x = 337,032,707,146.36
  5. Step 5: Solve for x
    x = 337,032,707,146.36/860,210.78
  6. Step 6: Final answer
    x = 391,802.47

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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.