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Finding the Fourth Proportional to 517,791.60, 776,687.40 and 143,814.60

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Solution

The fourth proportional to 517,791.60, 776,687.40 and 143,814.60 is: 215,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,791.60 : 776,687.40 = 143,814.60 : x
  2. Step 2: Convert to fraction form
    517,791.60/776,687.40 = 143,814.60/x
  3. Step 3: Cross multiply
    517,791.60x = 776,687.40 × 143,814.60
  4. Step 4: Simplify right side
    517,791.60x = 111,698,987,756.04
  5. Step 5: Solve for x
    x = 111,698,987,756.04/517,791.60
  6. Step 6: Final answer
    x = 215,721.90

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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.