Home / 309,724.72-426,967.70-218,920.48

Finding the Fourth Proportional to 309,724.72, 426,967.70 and 218,920.48

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Solution

The fourth proportional to 309,724.72, 426,967.70 and 218,920.48 is: 301,790.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,724.72 : 426,967.70 = 218,920.48 : x
  2. Step 2: Convert to fraction form
    309,724.72/426,967.70 = 218,920.48/x
  3. Step 3: Cross multiply
    309,724.72x = 426,967.70 × 218,920.48
  4. Step 4: Simplify right side
    309,724.72x = 93,471,973,828.50
  5. Step 5: Solve for x
    x = 93,471,973,828.50/309,724.72
  6. Step 6: Final answer
    x = 301,790.49

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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.