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Finding the Fourth Proportional to 716,675.31, 988,987.14 and 394,355.27

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Solution

The fourth proportional to 716,675.31, 988,987.14 and 394,355.27 is: 544,196.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,675.31 : 988,987.14 = 394,355.27 : x
  2. Step 2: Convert to fraction form
    716,675.31/988,987.14 = 394,355.27/x
  3. Step 3: Cross multiply
    716,675.31x = 988,987.14 × 394,355.27
  4. Step 4: Simplify right side
    716,675.31x = 390,012,288,649.45
  5. Step 5: Solve for x
    x = 390,012,288,649.45/716,675.31
  6. Step 6: Final answer
    x = 544,196.63

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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.