Home / 259,619.10-389,428.65-109,809.60

Finding the Fourth Proportional to 259,619.10, 389,428.65 and 109,809.60

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Solution

The fourth proportional to 259,619.10, 389,428.65 and 109,809.60 is: 164,714.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,619.10 : 389,428.65 = 109,809.60 : x
  2. Step 2: Convert to fraction form
    259,619.10/389,428.65 = 109,809.60/x
  3. Step 3: Cross multiply
    259,619.10x = 389,428.65 × 109,809.60
  4. Step 4: Simplify right side
    259,619.10x = 42,763,004,285.04
  5. Step 5: Solve for x
    x = 42,763,004,285.04/259,619.10
  6. Step 6: Final answer
    x = 164,714.40

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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.