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Finding the Fourth Proportional to 1,979.63, 2,958.12 and 1,508.51

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Solution

The fourth proportional to 1,979.63, 2,958.12 and 1,508.51 is: 2,254.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.63 : 2,958.12 = 1,508.51 : x
  2. Step 2: Convert to fraction form
    1,979.63/2,958.12 = 1,508.51/x
  3. Step 3: Cross multiply
    1,979.63x = 2,958.12 × 1,508.51
  4. Step 4: Simplify right side
    1,979.63x = 4,462,353.60
  5. Step 5: Solve for x
    x = 4,462,353.60/1,979.63
  6. Step 6: Final answer
    x = 2,254.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.