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Finding the Fourth Proportional to 346,940.56, 520,487.32 and 147,431.48

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Solution

The fourth proportional to 346,940.56, 520,487.32 and 147,431.48 is: 221,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,940.56 : 520,487.32 = 147,431.48 : x
  2. Step 2: Convert to fraction form
    346,940.56/520,487.32 = 147,431.48/x
  3. Step 3: Cross multiply
    346,940.56x = 520,487.32 × 147,431.48
  4. Step 4: Simplify right side
    346,940.56x = 76,736,215,908.83
  5. Step 5: Solve for x
    x = 76,736,215,908.83/346,940.56
  6. Step 6: Final answer
    x = 221,179.72

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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.