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Finding the Fourth Proportional to 1,038.07, 1,558.14 and 745.91

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Solution

The fourth proportional to 1,038.07, 1,558.14 and 745.91 is: 1,119.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.07 : 1,558.14 = 745.91 : x
  2. Step 2: Convert to fraction form
    1,038.07/1,558.14 = 745.91/x
  3. Step 3: Cross multiply
    1,038.07x = 1,558.14 × 745.91
  4. Step 4: Simplify right side
    1,038.07x = 1,162,227.46
  5. Step 5: Solve for x
    x = 1,162,227.46/1,038.07
  6. Step 6: Final answer
    x = 1,119.61

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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.