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Finding the Fourth Proportional to 539,343.38, 809,008.58 and 139,948.58

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Solution

The fourth proportional to 539,343.38, 809,008.58 and 139,948.58 is: 209,921.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,343.38 : 809,008.58 = 139,948.58 : x
  2. Step 2: Convert to fraction form
    539,343.38/809,008.58 = 139,948.58/x
  3. Step 3: Cross multiply
    539,343.38x = 809,008.58 × 139,948.58
  4. Step 4: Simplify right side
    539,343.38x = 113,219,601,978.82
  5. Step 5: Solve for x
    x = 113,219,601,978.82/539,343.38
  6. Step 6: Final answer
    x = 209,921.19

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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.