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Finding the Fourth Proportional to 2,018.75, 3,028.55 and 631.98

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Solution

The fourth proportional to 2,018.75, 3,028.55 and 631.98 is: 948.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,018.75 : 3,028.55 = 631.98 : x
  2. Step 2: Convert to fraction form
    2,018.75/3,028.55 = 631.98/x
  3. Step 3: Cross multiply
    2,018.75x = 3,028.55 × 631.98
  4. Step 4: Simplify right side
    2,018.75x = 1,913,979.87
  5. Step 5: Solve for x
    x = 1,913,979.87/2,018.75
  6. Step 6: Final answer
    x = 948.10

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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.