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Finding the Fourth Proportional to 392,937, 589,405.50 and 143,619

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Solution

The fourth proportional to 392,937, 589,405.50 and 143,619 is: 215,428.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,937 : 589,405.50 = 143,619 : x
  2. Step 2: Convert to fraction form
    392,937/589,405.50 = 143,619/x
  3. Step 3: Cross multiply
    392,937x = 589,405.50 × 143,619
  4. Step 4: Simplify right side
    392,937x = 84,649,828,504.50
  5. Step 5: Solve for x
    x = 84,649,828,504.50/392,937
  6. Step 6: Final answer
    x = 215,428.50

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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.