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Finding the Fourth Proportional to 539,130.60, 809,279.10 and 339,676.20

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Solution

The fourth proportional to 539,130.60, 809,279.10 and 339,676.20 is: 509,881.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,130.60 : 809,279.10 = 339,676.20 : x
  2. Step 2: Convert to fraction form
    539,130.60/809,279.10 = 339,676.20/x
  3. Step 3: Cross multiply
    539,130.60x = 809,279.10 × 339,676.20
  4. Step 4: Simplify right side
    539,130.60x = 274,892,849,427.42
  5. Step 5: Solve for x
    x = 274,892,849,427.42/539,130.60
  6. Step 6: Final answer
    x = 509,881.74

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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.