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Finding the Fourth Proportional to 1,448.39, 1,998.03 and 916.37

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Solution

The fourth proportional to 1,448.39, 1,998.03 and 916.37 is: 1,264.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.39 : 1,998.03 = 916.37 : x
  2. Step 2: Convert to fraction form
    1,448.39/1,998.03 = 916.37/x
  3. Step 3: Cross multiply
    1,448.39x = 1,998.03 × 916.37
  4. Step 4: Simplify right side
    1,448.39x = 1,830,943.18
  5. Step 5: Solve for x
    x = 1,830,943.18/1,448.39
  6. Step 6: Final answer
    x = 1,264.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.