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Finding the Fourth Proportional to 469,867.63, 648,422.18 and 255,009.55

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Solution

The fourth proportional to 469,867.63, 648,422.18 and 255,009.55 is: 351,915.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,867.63 : 648,422.18 = 255,009.55 : x
  2. Step 2: Convert to fraction form
    469,867.63/648,422.18 = 255,009.55/x
  3. Step 3: Cross multiply
    469,867.63x = 648,422.18 × 255,009.55
  4. Step 4: Simplify right side
    469,867.63x = 165,353,848,331.82
  5. Step 5: Solve for x
    x = 165,353,848,331.82/469,867.63
  6. Step 6: Final answer
    x = 351,915.81

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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.