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Finding the Fourth Proportional to 401,394.78, 553,924.44 and 220,109.58

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Solution

The fourth proportional to 401,394.78, 553,924.44 and 220,109.58 is: 303,751.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,394.78 : 553,924.44 = 220,109.58 : x
  2. Step 2: Convert to fraction form
    401,394.78/553,924.44 = 220,109.58/x
  3. Step 3: Cross multiply
    401,394.78x = 553,924.44 × 220,109.58
  4. Step 4: Simplify right side
    401,394.78x = 121,924,075,840.14
  5. Step 5: Solve for x
    x = 121,924,075,840.14/401,394.78
  6. Step 6: Final answer
    x = 303,751.02

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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.