Home / 667,900,867.11-921,599,253.52-381,788,308.90

Finding the Fourth Proportional to 667,900,867.11, 921,599,253.52 and 381,788,308.90

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Solution

The fourth proportional to 667,900,867.11, 921,599,253.52 and 381,788,308.90 is: 526,808,449.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,900,867.11 : 921,599,253.52 = 381,788,308.90 : x
  2. Step 2: Convert to fraction form
    667,900,867.11/921,599,253.52 = 381,788,308.90/x
  3. Step 3: Cross multiply
    667,900,867.11x = 921,599,253.52 × 381,788,308.90
  4. Step 4: Simplify right side
    667,900,867.11x = 351,855,820,484,903,168
  5. Step 5: Solve for x
    x = 351,855,820,484,903,168/667,900,867.11
  6. Step 6: Final answer
    x = 526,808,449.89

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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.