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Finding the Fourth Proportional to 565,538.70, 848,300.64 and 139,078.21

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Solution

The fourth proportional to 565,538.70, 848,300.64 and 139,078.21 is: 208,615.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,538.70 : 848,300.64 = 139,078.21 : x
  2. Step 2: Convert to fraction form
    565,538.70/848,300.64 = 139,078.21/x
  3. Step 3: Cross multiply
    565,538.70x = 848,300.64 × 139,078.21
  4. Step 4: Simplify right side
    565,538.70x = 117,980,134,553.05
  5. Step 5: Solve for x
    x = 117,980,134,553.05/565,538.70
  6. Step 6: Final answer
    x = 208,615.49

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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.