Home / 918,893.42-1,378,340.13-419,907.50

Finding the Fourth Proportional to 918,893.42, 1,378,340.13 and 419,907.50

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Solution

The fourth proportional to 918,893.42, 1,378,340.13 and 419,907.50 is: 629,861.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,893.42 : 1,378,340.13 = 419,907.50 : x
  2. Step 2: Convert to fraction form
    918,893.42/1,378,340.13 = 419,907.50/x
  3. Step 3: Cross multiply
    918,893.42x = 1,378,340.13 × 419,907.50
  4. Step 4: Simplify right side
    918,893.42x = 578,775,358,137.98
  5. Step 5: Solve for x
    x = 578,775,358,137.98/918,893.42
  6. Step 6: Final answer
    x = 629,861.25

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1.5x scale

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.