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Finding the Fourth Proportional to 315,639.72, 434,665.37 and 274,227.59

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Solution

The fourth proportional to 315,639.72, 434,665.37 and 274,227.59 is: 377,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,639.72 : 434,665.37 = 274,227.59 : x
  2. Step 2: Convert to fraction form
    315,639.72/434,665.37 = 274,227.59/x
  3. Step 3: Cross multiply
    315,639.72x = 434,665.37 × 274,227.59
  4. Step 4: Simplify right side
    315,639.72x = 119,197,238,643.79
  5. Step 5: Solve for x
    x = 119,197,238,643.79/315,639.72
  6. Step 6: Final answer
    x = 377,637.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.