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Finding the Fourth Proportional to 1,042.08, 1,563.18 and 889.08

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Solution

The fourth proportional to 1,042.08, 1,563.18 and 889.08 is: 1,333.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.08 : 1,563.18 = 889.08 : x
  2. Step 2: Convert to fraction form
    1,042.08/1,563.18 = 889.08/x
  3. Step 3: Cross multiply
    1,042.08x = 1,563.18 × 889.08
  4. Step 4: Simplify right side
    1,042.08x = 1,389,792.07
  5. Step 5: Solve for x
    x = 1,389,792.07/1,042.08
  6. Step 6: Final answer
    x = 1,333.67

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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.