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Finding the Fourth Proportional to 392,651.93, 589,070.20 and 126,402.50

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Solution

The fourth proportional to 392,651.93, 589,070.20 and 126,402.50 is: 189,633.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,651.93 : 589,070.20 = 126,402.50 : x
  2. Step 2: Convert to fraction form
    392,651.93/589,070.20 = 126,402.50/x
  3. Step 3: Cross multiply
    392,651.93x = 589,070.20 × 126,402.50
  4. Step 4: Simplify right side
    392,651.93x = 74,459,945,955.50
  5. Step 5: Solve for x
    x = 74,459,945,955.50/392,651.93
  6. Step 6: Final answer
    x = 189,633.46

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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.