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Finding the Fourth Proportional to 1,907.68, 2,857.20 and 1,691.68

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Solution

The fourth proportional to 1,907.68, 2,857.20 and 1,691.68 is: 2,533.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.68 : 2,857.20 = 1,691.68 : x
  2. Step 2: Convert to fraction form
    1,907.68/2,857.20 = 1,691.68/x
  3. Step 3: Cross multiply
    1,907.68x = 2,857.20 × 1,691.68
  4. Step 4: Simplify right side
    1,907.68x = 4,833,468.10
  5. Step 5: Solve for x
    x = 4,833,468.10/1,907.68
  6. Step 6: Final answer
    x = 2,533.69

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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.