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Finding the Fourth Proportional to 1,262.31, 1,889.51 and 845.03

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Solution

The fourth proportional to 1,262.31, 1,889.51 and 845.03 is: 1,264.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.31 : 1,889.51 = 845.03 : x
  2. Step 2: Convert to fraction form
    1,262.31/1,889.51 = 845.03/x
  3. Step 3: Cross multiply
    1,262.31x = 1,889.51 × 845.03
  4. Step 4: Simplify right side
    1,262.31x = 1,596,678.96
  5. Step 5: Solve for x
    x = 1,596,678.96/1,262.31
  6. Step 6: Final answer
    x = 1,264.89

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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.