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Finding the Fourth Proportional to 1,998.93, 2,998.75 and 612.24

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Solution

The fourth proportional to 1,998.93, 2,998.75 and 612.24 is: 918.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.93 : 2,998.75 = 612.24 : x
  2. Step 2: Convert to fraction form
    1,998.93/2,998.75 = 612.24/x
  3. Step 3: Cross multiply
    1,998.93x = 2,998.75 × 612.24
  4. Step 4: Simplify right side
    1,998.93x = 1,835,939.71
  5. Step 5: Solve for x
    x = 1,835,939.71/1,998.93
  6. Step 6: Final answer
    x = 918.46

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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.