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Finding the Fourth Proportional to 718,147.88, 991,043.82 and 395,863.34

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Solution

The fourth proportional to 718,147.88, 991,043.82 and 395,863.34 is: 546,291.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,147.88 : 991,043.82 = 395,863.34 : x
  2. Step 2: Convert to fraction form
    718,147.88/991,043.82 = 395,863.34/x
  3. Step 3: Cross multiply
    718,147.88x = 991,043.82 × 395,863.34
  4. Step 4: Simplify right side
    718,147.88x = 392,317,916,671.56
  5. Step 5: Solve for x
    x = 392,317,916,671.56/718,147.88
  6. Step 6: Final answer
    x = 546,291.27

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1.5x scale

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.