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Finding the Fourth Proportional to 1,063.64, 1,588.12 and 998.06

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Solution

The fourth proportional to 1,063.64, 1,588.12 and 998.06 is: 1,490.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.64 : 1,588.12 = 998.06 : x
  2. Step 2: Convert to fraction form
    1,063.64/1,588.12 = 998.06/x
  3. Step 3: Cross multiply
    1,063.64x = 1,588.12 × 998.06
  4. Step 4: Simplify right side
    1,063.64x = 1,585,039.05
  5. Step 5: Solve for x
    x = 1,585,039.05/1,063.64
  6. Step 6: Final answer
    x = 1,490.20

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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.