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Finding the Fourth Proportional to 492,138.60, 689,460.60 and 492,138.60

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Solution

The fourth proportional to 492,138.60, 689,460.60 and 492,138.60 is: 689,460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,138.60 : 689,460.60 = 492,138.60 : x
  2. Step 2: Convert to fraction form
    492,138.60/689,460.60 = 492,138.60/x
  3. Step 3: Cross multiply
    492,138.60x = 689,460.60 × 492,138.60
  4. Step 4: Simplify right side
    492,138.60x = 339,310,174,439.16
  5. Step 5: Solve for x
    x = 339,310,174,439.16/492,138.60
  6. Step 6: Final answer
    x = 689,460.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.