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Finding the Fourth Proportional to 488,983.20, 685,509.60 and 488,983.20

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Solution

The fourth proportional to 488,983.20, 685,509.60 and 488,983.20 is: 685,509.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,983.20 : 685,509.60 = 488,983.20 : x
  2. Step 2: Convert to fraction form
    488,983.20/685,509.60 = 488,983.20/x
  3. Step 3: Cross multiply
    488,983.20x = 685,509.60 × 488,983.20
  4. Step 4: Simplify right side
    488,983.20x = 335,202,677,838.72
  5. Step 5: Solve for x
    x = 335,202,677,838.72/488,983.20
  6. Step 6: Final answer
    x = 685,509.60

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1.5x scale

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.