Home / 478,420,650.74-660,220,942.95-258,404,076.74

Finding the Fourth Proportional to 478,420,650.74, 660,220,942.95 and 258,404,076.74

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Solution

The fourth proportional to 478,420,650.74, 660,220,942.95 and 258,404,076.74 is: 356,597,866.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,420,650.74 : 660,220,942.95 = 258,404,076.74 : x
  2. Step 2: Convert to fraction form
    478,420,650.74/660,220,942.95 = 258,404,076.74/x
  3. Step 3: Cross multiply
    478,420,650.74x = 660,220,942.95 × 258,404,076.74
  4. Step 4: Simplify right side
    478,420,650.74x = 170,603,783,204,105,888
  5. Step 5: Solve for x
    x = 170,603,783,204,105,888/478,420,650.74
  6. Step 6: Final answer
    x = 356,597,866.21

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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.