Home / 390,482,863.12-538,864,872.87-214,273,807.30

Finding the Fourth Proportional to 390,482,863.12, 538,864,872.87 and 214,273,807.30

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Solution

The fourth proportional to 390,482,863.12, 538,864,872.87 and 214,273,807.30 is: 295,697,042.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,482,863.12 : 538,864,872.87 = 214,273,807.30 : x
  2. Step 2: Convert to fraction form
    390,482,863.12/538,864,872.87 = 214,273,807.30/x
  3. Step 3: Cross multiply
    390,482,863.12x = 538,864,872.87 × 214,273,807.30
  4. Step 4: Simplify right side
    390,482,863.12x = 115,464,627,930,085,392
  5. Step 5: Solve for x
    x = 115,464,627,930,085,392/390,482,863.12
  6. Step 6: Final answer
    x = 295,697,042.91

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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.