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Finding the Fourth Proportional to 716,596.91, 988,874.09 and 389,911.27

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Solution

The fourth proportional to 716,596.91, 988,874.09 and 389,911.27 is: 538,061.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,596.91 : 988,874.09 = 389,911.27 : x
  2. Step 2: Convert to fraction form
    716,596.91/988,874.09 = 389,911.27/x
  3. Step 3: Cross multiply
    716,596.91x = 988,874.09 × 389,911.27
  4. Step 4: Simplify right side
    716,596.91x = 385,573,145,408.07
  5. Step 5: Solve for x
    x = 385,573,145,408.07/716,596.91
  6. Step 6: Final answer
    x = 538,061.41

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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.