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Finding the Fourth Proportional to 485,592.60, 728,129.70 and 204,792.60

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Solution

The fourth proportional to 485,592.60, 728,129.70 and 204,792.60 is: 307,079.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,592.60 : 728,129.70 = 204,792.60 : x
  2. Step 2: Convert to fraction form
    485,592.60/728,129.70 = 204,792.60/x
  3. Step 3: Cross multiply
    485,592.60x = 728,129.70 × 204,792.60
  4. Step 4: Simplify right side
    485,592.60x = 149,115,574,400.22
  5. Step 5: Solve for x
    x = 149,115,574,400.22/485,592.60
  6. Step 6: Final answer
    x = 307,079.59

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1.5x scale

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.