Home / 809,214.80-1,213,676.40-509,158.40

Finding the Fourth Proportional to 809,214.80, 1,213,676.40 and 509,158.40

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Solution

The fourth proportional to 809,214.80, 1,213,676.40 and 509,158.40 is: 763,645.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,214.80 : 1,213,676.40 = 509,158.40 : x
  2. Step 2: Convert to fraction form
    809,214.80/1,213,676.40 = 509,158.40/x
  3. Step 3: Cross multiply
    809,214.80x = 1,213,676.40 × 509,158.40
  4. Step 4: Simplify right side
    809,214.80x = 617,953,533,941.76
  5. Step 5: Solve for x
    x = 617,953,533,941.76/809,214.80
  6. Step 6: Final answer
    x = 763,645.86

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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.