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Finding the Fourth Proportional to 1,991,271.83, 2,746,960.32 and 1,257,135.95

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Solution

The fourth proportional to 1,991,271.83, 2,746,960.32 and 1,257,135.95 is: 1,734,219.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991,271.83 : 2,746,960.32 = 1,257,135.95 : x
  2. Step 2: Convert to fraction form
    1,991,271.83/2,746,960.32 = 1,257,135.95/x
  3. Step 3: Cross multiply
    1,991,271.83x = 2,746,960.32 × 1,257,135.95
  4. Step 4: Simplify right side
    1,991,271.83x = 3,453,302,583,077.16
  5. Step 5: Solve for x
    x = 3,453,302,583,077.16/1,991,271.83
  6. Step 6: Final answer
    x = 1,734,219.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.