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Finding the Fourth Proportional to 716,364, 988,517.52 and 394,087.68

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Solution

The fourth proportional to 716,364, 988,517.52 and 394,087.68 is: 543,805.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,364 : 988,517.52 = 394,087.68 : x
  2. Step 2: Convert to fraction form
    716,364/988,517.52 = 394,087.68/x
  3. Step 3: Cross multiply
    716,364x = 988,517.52 × 394,087.68
  4. Step 4: Simplify right side
    716,364x = 389,562,576,096.15
  5. Step 5: Solve for x
    x = 389,562,576,096.15/716,364
  6. Step 6: Final answer
    x = 543,805.35

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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.