Home / 989,418.84-1,484,836.86-421,198.32

Finding the Fourth Proportional to 989,418.84, 1,484,836.86 and 421,198.32

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Solution

The fourth proportional to 989,418.84, 1,484,836.86 and 421,198.32 is: 632,099.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,418.84 : 1,484,836.86 = 421,198.32 : x
  2. Step 2: Convert to fraction form
    989,418.84/1,484,836.86 = 421,198.32/x
  3. Step 3: Cross multiply
    989,418.84x = 1,484,836.86 × 421,198.32
  4. Step 4: Simplify right side
    989,418.84x = 625,410,790,906.08
  5. Step 5: Solve for x
    x = 625,410,790,906.08/989,418.84
  6. Step 6: Final answer
    x = 632,099.13

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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.