Home / 403,021.32-556,169.40-221,729.34

Finding the Fourth Proportional to 403,021.32, 556,169.40 and 221,729.34

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Solution

The fourth proportional to 403,021.32, 556,169.40 and 221,729.34 is: 305,986.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,021.32 : 556,169.40 = 221,729.34 : x
  2. Step 2: Convert to fraction form
    403,021.32/556,169.40 = 221,729.34/x
  3. Step 3: Cross multiply
    403,021.32x = 556,169.40 × 221,729.34
  4. Step 4: Simplify right side
    403,021.32x = 123,319,073,990.20
  5. Step 5: Solve for x
    x = 123,319,073,990.20/403,021.32
  6. Step 6: Final answer
    x = 305,986.48

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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.