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Finding the Fourth Proportional to 518,942.36, 716,140.14 and 280,478.36

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Solution

The fourth proportional to 518,942.36, 716,140.14 and 280,478.36 is: 387,059.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,942.36 : 716,140.14 = 280,478.36 : x
  2. Step 2: Convert to fraction form
    518,942.36/716,140.14 = 280,478.36/x
  3. Step 3: Cross multiply
    518,942.36x = 716,140.14 × 280,478.36
  4. Step 4: Simplify right side
    518,942.36x = 200,861,811,997.37
  5. Step 5: Solve for x
    x = 200,861,811,997.37/518,942.36
  6. Step 6: Final answer
    x = 387,059.97

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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.