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Finding the Fourth Proportional to 488,981.70, 685,507.50 and 488,981.70

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Solution

The fourth proportional to 488,981.70, 685,507.50 and 488,981.70 is: 685,507.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,981.70 : 685,507.50 = 488,981.70 : x
  2. Step 2: Convert to fraction form
    488,981.70/685,507.50 = 488,981.70/x
  3. Step 3: Cross multiply
    488,981.70x = 685,507.50 × 488,981.70
  4. Step 4: Simplify right side
    488,981.70x = 335,200,622,712.75
  5. Step 5: Solve for x
    x = 335,200,622,712.75/488,981.70
  6. Step 6: Final answer
    x = 685,507.50

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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.