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Finding the Fourth Proportional to 403,405.72, 556,695.44 and 222,112.98

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Solution

The fourth proportional to 403,405.72, 556,695.44 and 222,112.98 is: 306,513.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,405.72 : 556,695.44 = 222,112.98 : x
  2. Step 2: Convert to fraction form
    403,405.72/556,695.44 = 222,112.98/x
  3. Step 3: Cross multiply
    403,405.72x = 556,695.44 × 222,112.98
  4. Step 4: Simplify right side
    403,405.72x = 123,649,283,130.81
  5. Step 5: Solve for x
    x = 123,649,283,130.81/403,405.72
  6. Step 6: Final answer
    x = 306,513.46

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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.