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Finding the Fourth Proportional to 716,712.96, 989,064 and 394,446

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Solution

The fourth proportional to 716,712.96, 989,064 and 394,446 is: 544,335.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,712.96 : 989,064 = 394,446 : x
  2. Step 2: Convert to fraction form
    716,712.96/989,064 = 394,446/x
  3. Step 3: Cross multiply
    716,712.96x = 989,064 × 394,446
  4. Step 4: Simplify right side
    716,712.96x = 390,132,338,544
  5. Step 5: Solve for x
    x = 390,132,338,544/716,712.96
  6. Step 6: Final answer
    x = 544,335.54

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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.