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Finding the Fourth Proportional to 426,313.98, 639,332.46 and 141,928.11

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Solution

The fourth proportional to 426,313.98, 639,332.46 and 141,928.11 is: 212,846.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,313.98 : 639,332.46 = 141,928.11 : x
  2. Step 2: Convert to fraction form
    426,313.98/639,332.46 = 141,928.11/x
  3. Step 3: Cross multiply
    426,313.98x = 639,332.46 × 141,928.11
  4. Step 4: Simplify right side
    426,313.98x = 90,739,247,709.45
  5. Step 5: Solve for x
    x = 90,739,247,709.45/426,313.98
  6. Step 6: Final answer
    x = 212,846.05

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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.