Home / 405,220.31-559,205.74-221,462.63

Finding the Fourth Proportional to 405,220.31, 559,205.74 and 221,462.63

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Solution

The fourth proportional to 405,220.31, 559,205.74 and 221,462.63 is: 305,619.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,220.31 : 559,205.74 = 221,462.63 : x
  2. Step 2: Convert to fraction form
    405,220.31/559,205.74 = 221,462.63/x
  3. Step 3: Cross multiply
    405,220.31x = 559,205.74 × 221,462.63
  4. Step 4: Simplify right side
    405,220.31x = 123,843,173,891.50
  5. Step 5: Solve for x
    x = 123,843,173,891.50/405,220.31
  6. Step 6: Final answer
    x = 305,619.37

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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.