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Finding the Fourth Proportional to 591,609.40, 887,970.90 and 311,327.80

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Solution

The fourth proportional to 591,609.40, 887,970.90 and 311,327.80 is: 467,284.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,609.40 : 887,970.90 = 311,327.80 : x
  2. Step 2: Convert to fraction form
    591,609.40/887,970.90 = 311,327.80/x
  3. Step 3: Cross multiply
    591,609.40x = 887,970.90 × 311,327.80
  4. Step 4: Simplify right side
    591,609.40x = 276,450,026,761.02
  5. Step 5: Solve for x
    x = 276,450,026,761.02/591,609.40
  6. Step 6: Final answer
    x = 467,284.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.