Home / 2,154,336.90-3,231,979.20-638,138.40

Finding the Fourth Proportional to 2,154,336.90, 3,231,979.20 and 638,138.40

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Solution

The fourth proportional to 2,154,336.90, 3,231,979.20 and 638,138.40 is: 957,347.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154,336.90 : 3,231,979.20 = 638,138.40 : x
  2. Step 2: Convert to fraction form
    2,154,336.90/3,231,979.20 = 638,138.40/x
  3. Step 3: Cross multiply
    2,154,336.90x = 3,231,979.20 × 638,138.40
  4. Step 4: Simplify right side
    2,154,336.90x = 2,062,450,035,521.28
  5. Step 5: Solve for x
    x = 2,062,450,035,521.28/2,154,336.90
  6. Step 6: Final answer
    x = 957,347.96

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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.