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Finding the Fourth Proportional to 643,157.60, 887,499.33 and 356,676.80

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Solution

The fourth proportional to 643,157.60, 887,499.33 and 356,676.80 is: 492,181.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,157.60 : 887,499.33 = 356,676.80 : x
  2. Step 2: Convert to fraction form
    643,157.60/887,499.33 = 356,676.80/x
  3. Step 3: Cross multiply
    643,157.60x = 887,499.33 × 356,676.80
  4. Step 4: Simplify right side
    643,157.60x = 316,550,421,026.54
  5. Step 5: Solve for x
    x = 316,550,421,026.54/643,157.60
  6. Step 6: Final answer
    x = 492,181.73

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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.