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Finding the Fourth Proportional to 401,170.20, 553,619.25 and 219,878.16

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Solution

The fourth proportional to 401,170.20, 553,619.25 and 219,878.16 is: 303,434.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,170.20 : 553,619.25 = 219,878.16 : x
  2. Step 2: Convert to fraction form
    401,170.20/553,619.25 = 219,878.16/x
  3. Step 3: Cross multiply
    401,170.20x = 553,619.25 × 219,878.16
  4. Step 4: Simplify right side
    401,170.20x = 121,728,782,030.58
  5. Step 5: Solve for x
    x = 121,728,782,030.58/401,170.20
  6. Step 6: Final answer
    x = 303,434.26

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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.