Home / 871,342.30-1,305,120.72-421,118.95

Finding the Fourth Proportional to 871,342.30, 1,305,120.72 and 421,118.95

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Solution

The fourth proportional to 871,342.30, 1,305,120.72 and 421,118.95 is: 630,763.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,342.30 : 1,305,120.72 = 421,118.95 : x
  2. Step 2: Convert to fraction form
    871,342.30/1,305,120.72 = 421,118.95/x
  3. Step 3: Cross multiply
    871,342.30x = 1,305,120.72 × 421,118.95
  4. Step 4: Simplify right side
    871,342.30x = 549,611,067,229.64
  5. Step 5: Solve for x
    x = 549,611,067,229.64/871,342.30
  6. Step 6: Final answer
    x = 630,763.67

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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.