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Finding the Fourth Proportional to 421,503.64, 631,959.71 and 155,229.98

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Solution

The fourth proportional to 421,503.64, 631,959.71 and 155,229.98 is: 232,736.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,503.64 : 631,959.71 = 155,229.98 : x
  2. Step 2: Convert to fraction form
    421,503.64/631,959.71 = 155,229.98/x
  3. Step 3: Cross multiply
    421,503.64x = 631,959.71 × 155,229.98
  4. Step 4: Simplify right side
    421,503.64x = 98,099,089,208.16
  5. Step 5: Solve for x
    x = 98,099,089,208.16/421,503.64
  6. Step 6: Final answer
    x = 232,736.04

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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.