Home / 280,831,570.80-421,247,356.20-212,807,122.80

Finding the Fourth Proportional to 280,831,570.80, 421,247,356.20 and 212,807,122.80

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Solution

The fourth proportional to 280,831,570.80, 421,247,356.20 and 212,807,122.80 is: 319,210,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,831,570.80 : 421,247,356.20 = 212,807,122.80 : x
  2. Step 2: Convert to fraction form
    280,831,570.80/421,247,356.20 = 212,807,122.80/x
  3. Step 3: Cross multiply
    280,831,570.80x = 421,247,356.20 × 212,807,122.80
  4. Step 4: Simplify right side
    280,831,570.80x = 89,644,437,860,028,736
  5. Step 5: Solve for x
    x = 89,644,437,860,028,736/280,831,570.80
  6. Step 6: Final answer
    x = 319,210,684.20

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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.