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Finding the Fourth Proportional to 1,325,418, 1,988,127 and 328,146

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Solution

The fourth proportional to 1,325,418, 1,988,127 and 328,146 is: 492,219

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325,418 : 1,988,127 = 328,146 : x
  2. Step 2: Convert to fraction form
    1,325,418/1,988,127 = 328,146/x
  3. Step 3: Cross multiply
    1,325,418x = 1,988,127 × 328,146
  4. Step 4: Simplify right side
    1,325,418x = 652,395,922,542
  5. Step 5: Solve for x
    x = 652,395,922,542/1,325,418
  6. Step 6: Final answer
    x = 492,219

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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.