Home / 990,474.32-1,484,858.82-421,334.30

Finding the Fourth Proportional to 990,474.32, 1,484,858.82 and 421,334.30

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Solution

The fourth proportional to 990,474.32, 1,484,858.82 and 421,334.30 is: 631,638.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,474.32 : 1,484,858.82 = 421,334.30 : x
  2. Step 2: Convert to fraction form
    990,474.32/1,484,858.82 = 421,334.30/x
  3. Step 3: Cross multiply
    990,474.32x = 1,484,858.82 × 421,334.30
  4. Step 4: Simplify right side
    990,474.32x = 625,621,951,523.53
  5. Step 5: Solve for x
    x = 625,621,951,523.53/990,474.32
  6. Step 6: Final answer
    x = 631,638.74

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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.