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Finding the Fourth Proportional to 716,556.48, 988,871.76 and 394,290.24

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Solution

The fourth proportional to 716,556.48, 988,871.76 and 394,290.24 is: 544,133.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,556.48 : 988,871.76 = 394,290.24 : x
  2. Step 2: Convert to fraction form
    716,556.48/988,871.76 = 394,290.24/x
  3. Step 3: Cross multiply
    716,556.48x = 988,871.76 × 394,290.24
  4. Step 4: Simplify right side
    716,556.48x = 389,902,483,579.62
  5. Step 5: Solve for x
    x = 389,902,483,579.62/716,556.48
  6. Step 6: Final answer
    x = 544,133.64

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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.