Home / 1,491,138.40-2,236,999.20-638,208.40

Finding the Fourth Proportional to 1,491,138.40, 2,236,999.20 and 638,208.40

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Solution

The fourth proportional to 1,491,138.40, 2,236,999.20 and 638,208.40 is: 957,437.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491,138.40 : 2,236,999.20 = 638,208.40 : x
  2. Step 2: Convert to fraction form
    1,491,138.40/2,236,999.20 = 638,208.40/x
  3. Step 3: Cross multiply
    1,491,138.40x = 2,236,999.20 × 638,208.40
  4. Step 4: Simplify right side
    1,491,138.40x = 1,427,671,680,233.28
  5. Step 5: Solve for x
    x = 1,427,671,680,233.28/1,491,138.40
  6. Step 6: Final answer
    x = 957,437.41

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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.