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Finding the Fourth Proportional to 392,017.09, 587,955.49 and 103,830.70

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Solution

The fourth proportional to 392,017.09, 587,955.49 and 103,830.70 is: 155,727.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,017.09 : 587,955.49 = 103,830.70 : x
  2. Step 2: Convert to fraction form
    392,017.09/587,955.49 = 103,830.70/x
  3. Step 3: Cross multiply
    392,017.09x = 587,955.49 × 103,830.70
  4. Step 4: Simplify right side
    392,017.09x = 61,047,830,095.54
  5. Step 5: Solve for x
    x = 61,047,830,095.54/392,017.09
  6. Step 6: Final answer
    x = 155,727.47

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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.