Home / 667,900,868.61-921,599,255.59-381,788,310.40

Finding the Fourth Proportional to 667,900,868.61, 921,599,255.59 and 381,788,310.40

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Solution

The fourth proportional to 667,900,868.61, 921,599,255.59 and 381,788,310.40 is: 526,808,451.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,900,868.61 : 921,599,255.59 = 381,788,310.40 : x
  2. Step 2: Convert to fraction form
    667,900,868.61/921,599,255.59 = 381,788,310.40/x
  3. Step 3: Cross multiply
    667,900,868.61x = 921,599,255.59 × 381,788,310.40
  4. Step 4: Simplify right side
    667,900,868.61x = 351,855,822,657,603,840
  5. Step 5: Solve for x
    x = 351,855,822,657,603,840/667,900,868.61
  6. Step 6: Final answer
    x = 526,808,451.96

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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.