Home / 403,012.18-556,156.78-221,720.22

Finding the Fourth Proportional to 403,012.18, 556,156.78 and 221,720.22

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Solution

The fourth proportional to 403,012.18, 556,156.78 and 221,720.22 is: 305,973.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,012.18 : 556,156.78 = 221,720.22 : x
  2. Step 2: Convert to fraction form
    403,012.18/556,156.78 = 221,720.22/x
  3. Step 3: Cross multiply
    403,012.18x = 556,156.78 × 221,720.22
  4. Step 4: Simplify right side
    403,012.18x = 123,311,203,135.83
  5. Step 5: Solve for x
    x = 123,311,203,135.83/403,012.18
  6. Step 6: Final answer
    x = 305,973.89

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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.