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Finding the Fourth Proportional to 716,396.60, 988,588.31 and 394,054.67

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Solution

The fourth proportional to 716,396.60, 988,588.31 and 394,054.67 is: 543,773.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,396.60 : 988,588.31 = 394,054.67 : x
  2. Step 2: Convert to fraction form
    716,396.60/988,588.31 = 394,054.67/x
  3. Step 3: Cross multiply
    716,396.60x = 988,588.31 × 394,054.67
  4. Step 4: Simplify right side
    716,396.60x = 389,557,833,349.69
  5. Step 5: Solve for x
    x = 389,557,833,349.69/716,396.60
  6. Step 6: Final answer
    x = 543,773.99

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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.