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Finding the Fourth Proportional to 392,040.37, 587,990.28 and 103,853.93

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Solution

The fourth proportional to 392,040.37, 587,990.28 and 103,853.93 is: 155,762.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,040.37 : 587,990.28 = 103,853.93 : x
  2. Step 2: Convert to fraction form
    392,040.37/587,990.28 = 103,853.93/x
  3. Step 3: Cross multiply
    392,040.37x = 587,990.28 × 103,853.93
  4. Step 4: Simplify right side
    392,040.37x = 61,065,101,379.80
  5. Step 5: Solve for x
    x = 61,065,101,379.80/392,040.37
  6. Step 6: Final answer
    x = 155,762.28

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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.