Home / 426,431.34-639,677.79-122,813.10

Finding the Fourth Proportional to 426,431.34, 639,677.79 and 122,813.10

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Solution

The fourth proportional to 426,431.34, 639,677.79 and 122,813.10 is: 184,228.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,431.34 : 639,677.79 = 122,813.10 : x
  2. Step 2: Convert to fraction form
    426,431.34/639,677.79 = 122,813.10/x
  3. Step 3: Cross multiply
    426,431.34x = 639,677.79 × 122,813.10
  4. Step 4: Simplify right side
    426,431.34x = 78,560,812,391.05
  5. Step 5: Solve for x
    x = 78,560,812,391.05/426,431.34
  6. Step 6: Final answer
    x = 184,228.51

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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.