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Finding the Fourth Proportional to 279,938,690.40, 419,908,035.60 and 254,856,424.80

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Solution

The fourth proportional to 279,938,690.40, 419,908,035.60 and 254,856,424.80 is: 382,284,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,690.40 : 419,908,035.60 = 254,856,424.80 : x
  2. Step 2: Convert to fraction form
    279,938,690.40/419,908,035.60 = 254,856,424.80/x
  3. Step 3: Cross multiply
    279,938,690.40x = 419,908,035.60 × 254,856,424.80
  4. Step 4: Simplify right side
    279,938,690.40x = 107,016,260,697,807,136
  5. Step 5: Solve for x
    x = 107,016,260,697,807,136/279,938,690.40
  6. Step 6: Final answer
    x = 382,284,637.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.