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Finding the Fourth Proportional to 661,291.64, 992,077.72 and 212,327.88

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Solution

The fourth proportional to 661,291.64, 992,077.72 and 212,327.88 is: 318,536.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,291.64 : 992,077.72 = 212,327.88 : x
  2. Step 2: Convert to fraction form
    661,291.64/992,077.72 = 212,327.88/x
  3. Step 3: Cross multiply
    661,291.64x = 992,077.72 × 212,327.88
  4. Step 4: Simplify right side
    661,291.64x = 210,645,761,606.50
  5. Step 5: Solve for x
    x = 210,645,761,606.50/661,291.64
  6. Step 6: Final answer
    x = 318,536.86

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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.