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Finding the Fourth Proportional to 716,853.40, 989,249.86 and 394,556.56

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Solution

The fourth proportional to 716,853.40, 989,249.86 and 394,556.56 is: 544,483.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,853.40 : 989,249.86 = 394,556.56 : x
  2. Step 2: Convert to fraction form
    716,853.40/989,249.86 = 394,556.56/x
  3. Step 3: Cross multiply
    716,853.40x = 989,249.86 × 394,556.56
  4. Step 4: Simplify right side
    716,853.40x = 390,315,021,742.08
  5. Step 5: Solve for x
    x = 390,315,021,742.08/716,853.40
  6. Step 6: Final answer
    x = 544,483.74

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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.