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Finding the Fourth Proportional to 2,388.69, 3,583.65 and 745.17

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Solution

The fourth proportional to 2,388.69, 3,583.65 and 745.17 is: 1,117.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,388.69 : 3,583.65 = 745.17 : x
  2. Step 2: Convert to fraction form
    2,388.69/3,583.65 = 745.17/x
  3. Step 3: Cross multiply
    2,388.69x = 3,583.65 × 745.17
  4. Step 4: Simplify right side
    2,388.69x = 2,670,428.47
  5. Step 5: Solve for x
    x = 2,670,428.47/2,388.69
  6. Step 6: Final answer
    x = 1,117.95

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1.5x scale

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.