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Finding the Fourth Proportional to 719,663.79, 993,140.24 and 397,367.79

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Solution

The fourth proportional to 719,663.79, 993,140.24 and 397,367.79 is: 548,369.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,663.79 : 993,140.24 = 397,367.79 : x
  2. Step 2: Convert to fraction form
    719,663.79/993,140.24 = 397,367.79/x
  3. Step 3: Cross multiply
    719,663.79x = 993,140.24 × 397,367.79
  4. Step 4: Simplify right side
    719,663.79x = 394,641,940,342.03
  5. Step 5: Solve for x
    x = 394,641,940,342.03/719,663.79
  6. Step 6: Final answer
    x = 548,369.87

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.