Home / 309,719.40-427,445.01-173,790.06

Finding the Fourth Proportional to 309,719.40, 427,445.01 and 173,790.06

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Solution

The fourth proportional to 309,719.40, 427,445.01 and 173,790.06 is: 239,848.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,719.40 : 427,445.01 = 173,790.06 : x
  2. Step 2: Convert to fraction form
    309,719.40/427,445.01 = 173,790.06/x
  3. Step 3: Cross multiply
    309,719.40x = 427,445.01 × 173,790.06
  4. Step 4: Simplify right side
    309,719.40x = 74,285,693,934.60
  5. Step 5: Solve for x
    x = 74,285,693,934.60/309,719.40
  6. Step 6: Final answer
    x = 239,848.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.