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Finding the Fourth Proportional to 279,120.96, 418,491.92 and 142,007.06

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Solution

The fourth proportional to 279,120.96, 418,491.92 and 142,007.06 is: 212,914.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,120.96 : 418,491.92 = 142,007.06 : x
  2. Step 2: Convert to fraction form
    279,120.96/418,491.92 = 142,007.06/x
  3. Step 3: Cross multiply
    279,120.96x = 418,491.92 × 142,007.06
  4. Step 4: Simplify right side
    279,120.96x = 59,428,808,594.20
  5. Step 5: Solve for x
    x = 59,428,808,594.20/279,120.96
  6. Step 6: Final answer
    x = 212,914.17

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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.