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Finding the Fourth Proportional to 918,889.92, 1,378,334.88 and 419,904

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Solution

The fourth proportional to 918,889.92, 1,378,334.88 and 419,904 is: 629,856.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,889.92 : 1,378,334.88 = 419,904 : x
  2. Step 2: Convert to fraction form
    918,889.92/1,378,334.88 = 419,904/x
  3. Step 3: Cross multiply
    918,889.92x = 1,378,334.88 × 419,904
  4. Step 4: Simplify right side
    918,889.92x = 578,768,329,451.52
  5. Step 5: Solve for x
    x = 578,768,329,451.52/918,889.92
  6. Step 6: Final answer
    x = 629,856.00

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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.