Home / 463,815.08-639,716.58-311,026.40

Finding the Fourth Proportional to 463,815.08, 639,716.58 and 311,026.40

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Solution

The fourth proportional to 463,815.08, 639,716.58 and 311,026.40 is: 428,982.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,815.08 : 639,716.58 = 311,026.40 : x
  2. Step 2: Convert to fraction form
    463,815.08/639,716.58 = 311,026.40/x
  3. Step 3: Cross multiply
    463,815.08x = 639,716.58 × 311,026.40
  4. Step 4: Simplify right side
    463,815.08x = 198,968,744,897.71
  5. Step 5: Solve for x
    x = 198,968,744,897.71/463,815.08
  6. Step 6: Final answer
    x = 428,982.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.