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Finding the Fourth Proportional to 889.40, 1,333.91 and 845.51

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Solution

The fourth proportional to 889.40, 1,333.91 and 845.51 is: 1,268.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.40 : 1,333.91 = 845.51 : x
  2. Step 2: Convert to fraction form
    889.40/1,333.91 = 845.51/x
  3. Step 3: Cross multiply
    889.40x = 1,333.91 × 845.51
  4. Step 4: Simplify right side
    889.40x = 1,127,829.69
  5. Step 5: Solve for x
    x = 1,127,829.69/889.40
  6. Step 6: Final answer
    x = 1,268.08

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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.