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Finding the Fourth Proportional to 508,735.20, 702,062.81 and 279,313.64

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Solution

The fourth proportional to 508,735.20, 702,062.81 and 279,313.64 is: 385,457.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,735.20 : 702,062.81 = 279,313.64 : x
  2. Step 2: Convert to fraction form
    508,735.20/702,062.81 = 279,313.64/x
  3. Step 3: Cross multiply
    508,735.20x = 702,062.81 × 279,313.64
  4. Step 4: Simplify right side
    508,735.20x = 196,095,718,969.73
  5. Step 5: Solve for x
    x = 196,095,718,969.73/508,735.20
  6. Step 6: Final answer
    x = 385,457.34

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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.