Home / 279,964.20-420,821.10-274,715.40

Finding the Fourth Proportional to 279,964.20, 420,821.10 and 274,715.40

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Solution

The fourth proportional to 279,964.20, 420,821.10 and 274,715.40 is: 412,931.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,964.20 : 420,821.10 = 274,715.40 : x
  2. Step 2: Convert to fraction form
    279,964.20/420,821.10 = 274,715.40/x
  3. Step 3: Cross multiply
    279,964.20x = 420,821.10 × 274,715.40
  4. Step 4: Simplify right side
    279,964.20x = 115,606,036,814.94
  5. Step 5: Solve for x
    x = 115,606,036,814.94/279,964.20
  6. Step 6: Final answer
    x = 412,931.50

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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.