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Finding the Fourth Proportional to 716,608.14, 988,889.52 and 389,922.50

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Solution

The fourth proportional to 716,608.14, 988,889.52 and 389,922.50 is: 538,076.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,608.14 : 988,889.52 = 389,922.50 : x
  2. Step 2: Convert to fraction form
    716,608.14/988,889.52 = 389,922.50/x
  3. Step 3: Cross multiply
    716,608.14x = 988,889.52 × 389,922.50
  4. Step 4: Simplify right side
    716,608.14x = 385,590,268,917.75
  5. Step 5: Solve for x
    x = 385,590,268,917.75/716,608.14
  6. Step 6: Final answer
    x = 538,076.88

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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.