Home / 813,129.32-1,219,857.60-280,670.96

Finding the Fourth Proportional to 813,129.32, 1,219,857.60 and 280,670.96

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Solution

The fourth proportional to 813,129.32, 1,219,857.60 and 280,670.96 is: 421,062.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,129.32 : 1,219,857.60 = 280,670.96 : x
  2. Step 2: Convert to fraction form
    813,129.32/1,219,857.60 = 280,670.96/x
  3. Step 3: Cross multiply
    813,129.32x = 1,219,857.60 × 280,670.96
  4. Step 4: Simplify right side
    813,129.32x = 342,378,603,655.30
  5. Step 5: Solve for x
    x = 342,378,603,655.30/813,129.32
  6. Step 6: Final answer
    x = 421,062.92

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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.