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Finding the Fourth Proportional to 1,398.47, 2,093.65 and 1,053.25

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Solution

The fourth proportional to 1,398.47, 2,093.65 and 1,053.25 is: 1,576.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.47 : 2,093.65 = 1,053.25 : x
  2. Step 2: Convert to fraction form
    1,398.47/2,093.65 = 1,053.25/x
  3. Step 3: Cross multiply
    1,398.47x = 2,093.65 × 1,053.25
  4. Step 4: Simplify right side
    1,398.47x = 2,205,140.77
  5. Step 5: Solve for x
    x = 2,205,140.77/1,398.47
  6. Step 6: Final answer
    x = 1,576.83

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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.