Home / 280,278.72-420,586.20-102,803.67

Finding the Fourth Proportional to 280,278.72, 420,586.20 and 102,803.67

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Solution

The fourth proportional to 280,278.72, 420,586.20 and 102,803.67 is: 154,267.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,278.72 : 420,586.20 = 102,803.67 : x
  2. Step 2: Convert to fraction form
    280,278.72/420,586.20 = 102,803.67/x
  3. Step 3: Cross multiply
    280,278.72x = 420,586.20 × 102,803.67
  4. Step 4: Simplify right side
    280,278.72x = 43,237,804,911.35
  5. Step 5: Solve for x
    x = 43,237,804,911.35/280,278.72
  6. Step 6: Final answer
    x = 154,267.17

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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.