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Finding the Fourth Proportional to 1,035.47, 1,553.91 and 890.88

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Solution

The fourth proportional to 1,035.47, 1,553.91 and 890.88 is: 1,336.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.47 : 1,553.91 = 890.88 : x
  2. Step 2: Convert to fraction form
    1,035.47/1,553.91 = 890.88/x
  3. Step 3: Cross multiply
    1,035.47x = 1,553.91 × 890.88
  4. Step 4: Simplify right side
    1,035.47x = 1,384,347.34
  5. Step 5: Solve for x
    x = 1,384,347.34/1,035.47
  6. Step 6: Final answer
    x = 1,336.93

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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.