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Finding the Fourth Proportional to 381,295.55, 525,709.09 and 279,143.66

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Solution

The fourth proportional to 381,295.55, 525,709.09 and 279,143.66 is: 384,867.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,295.55 : 525,709.09 = 279,143.66 : x
  2. Step 2: Convert to fraction form
    381,295.55/525,709.09 = 279,143.66/x
  3. Step 3: Cross multiply
    381,295.55x = 525,709.09 × 279,143.66
  4. Step 4: Simplify right side
    381,295.55x = 146,748,359,477.87
  5. Step 5: Solve for x
    x = 146,748,359,477.87/381,295.55
  6. Step 6: Final answer
    x = 384,867.75

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1.5x scale

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.