Home / 667,900,945.74-921,599,361.72-381,788,387.40

Finding the Fourth Proportional to 667,900,945.74, 921,599,361.72 and 381,788,387.40

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Solution

The fourth proportional to 667,900,945.74, 921,599,361.72 and 381,788,387.40 is: 526,808,558.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,900,945.74 : 921,599,361.72 = 381,788,387.40 : x
  2. Step 2: Convert to fraction form
    667,900,945.74/921,599,361.72 = 381,788,387.40/x
  3. Step 3: Cross multiply
    667,900,945.74x = 921,599,361.72 × 381,788,387.40
  4. Step 4: Simplify right side
    667,900,945.74x = 351,855,934,139,948,096
  5. Step 5: Solve for x
    x = 351,855,934,139,948,096/667,900,945.74
  6. Step 6: Final answer
    x = 526,808,558.04

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1.5x scale

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.