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Finding the Fourth Proportional to 1,924.86, 2,886.62 and 626

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Solution

The fourth proportional to 1,924.86, 2,886.62 and 626 is: 938.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,924.86 : 2,886.62 = 626 : x
  2. Step 2: Convert to fraction form
    1,924.86/2,886.62 = 626/x
  3. Step 3: Cross multiply
    1,924.86x = 2,886.62 × 626
  4. Step 4: Simplify right side
    1,924.86x = 1,807,024.12
  5. Step 5: Solve for x
    x = 1,807,024.12/1,924.86
  6. Step 6: Final answer
    x = 938.78

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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.