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Finding the Fourth Proportional to 401,769, 602,636.21 and 121,277.88

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Solution

The fourth proportional to 401,769, 602,636.21 and 121,277.88 is: 181,911.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,769 : 602,636.21 = 121,277.88 : x
  2. Step 2: Convert to fraction form
    401,769/602,636.21 = 121,277.88/x
  3. Step 3: Cross multiply
    401,769x = 602,636.21 × 121,277.88
  4. Step 4: Simplify right side
    401,769x = 73,086,441,960.03
  5. Step 5: Solve for x
    x = 73,086,441,960.03/401,769
  6. Step 6: Final answer
    x = 181,911.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.