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Finding the Fourth Proportional to 1,907.08, 2,631.18 and 1,319.08

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Solution

The fourth proportional to 1,907.08, 2,631.18 and 1,319.08 is: 1,819.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.08 : 2,631.18 = 1,319.08 : x
  2. Step 2: Convert to fraction form
    1,907.08/2,631.18 = 1,319.08/x
  3. Step 3: Cross multiply
    1,907.08x = 2,631.18 × 1,319.08
  4. Step 4: Simplify right side
    1,907.08x = 3,470,736.91
  5. Step 5: Solve for x
    x = 3,470,736.91/1,907.08
  6. Step 6: Final answer
    x = 1,819.92

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1.5x scale

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.