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Finding the Fourth Proportional to 2,907.63, 4,012.64 and 1,665.87

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Solution

The fourth proportional to 2,907.63, 4,012.64 and 1,665.87 is: 2,298.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.63 : 4,012.64 = 1,665.87 : x
  2. Step 2: Convert to fraction form
    2,907.63/4,012.64 = 1,665.87/x
  3. Step 3: Cross multiply
    2,907.63x = 4,012.64 × 1,665.87
  4. Step 4: Simplify right side
    2,907.63x = 6,684,528.27
  5. Step 5: Solve for x
    x = 6,684,528.27/2,907.63
  6. Step 6: Final answer
    x = 2,298.96

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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.