Home / 578,477,994.89-798,543,921.56-390,560,851.49

Finding the Fourth Proportional to 578,477,994.89, 798,543,921.56 and 390,560,851.49

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Solution

The fourth proportional to 578,477,994.89, 798,543,921.56 and 390,560,851.49 is: 539,138,907.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,477,994.89 : 798,543,921.56 = 390,560,851.49 : x
  2. Step 2: Convert to fraction form
    578,477,994.89/798,543,921.56 = 390,560,851.49/x
  3. Step 3: Cross multiply
    578,477,994.89x = 798,543,921.56 × 390,560,851.49
  4. Step 4: Simplify right side
    578,477,994.89x = 311,879,993,950,691,840
  5. Step 5: Solve for x
    x = 311,879,993,950,691,840/578,477,994.89
  6. Step 6: Final answer
    x = 539,138,907.11

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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.