Home / 381,666,220-526,721,881.86-287,414,079.19

Finding the Fourth Proportional to 381,666,220, 526,721,881.86 and 287,414,079.19

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Solution

The fourth proportional to 381,666,220, 526,721,881.86 and 287,414,079.19 is: 396,648,371.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,666,220 : 526,721,881.86 = 287,414,079.19 : x
  2. Step 2: Convert to fraction form
    381,666,220/526,721,881.86 = 287,414,079.19/x
  3. Step 3: Cross multiply
    381,666,220x = 526,721,881.86 × 287,414,079.19
  4. Step 4: Simplify right side
    381,666,220x = 151,387,284,664,015,872
  5. Step 5: Solve for x
    x = 151,387,284,664,015,872/381,666,220
  6. Step 6: Final answer
    x = 396,648,371.62

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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.