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Finding the Fourth Proportional to 328,571.48, 492,917.88 and 103,988.36

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Solution

The fourth proportional to 328,571.48, 492,917.88 and 103,988.36 is: 156,001.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,571.48 : 492,917.88 = 103,988.36 : x
  2. Step 2: Convert to fraction form
    328,571.48/492,917.88 = 103,988.36/x
  3. Step 3: Cross multiply
    328,571.48x = 492,917.88 × 103,988.36
  4. Step 4: Simplify right side
    328,571.48x = 51,257,721,955.88
  5. Step 5: Solve for x
    x = 51,257,721,955.88/328,571.48
  6. Step 6: Final answer
    x = 156,001.74

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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.