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Finding the Fourth Proportional to 1,998.54, 2,988.72 and 1,530.06

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Solution

The fourth proportional to 1,998.54, 2,988.72 and 1,530.06 is: 2,288.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.54 : 2,988.72 = 1,530.06 : x
  2. Step 2: Convert to fraction form
    1,998.54/2,988.72 = 1,530.06/x
  3. Step 3: Cross multiply
    1,998.54x = 2,988.72 × 1,530.06
  4. Step 4: Simplify right side
    1,998.54x = 4,572,920.92
  5. Step 5: Solve for x
    x = 4,572,920.92/1,998.54
  6. Step 6: Final answer
    x = 2,288.13

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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.