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Finding the Fourth Proportional to 485,734.20, 728,601.30 and 308,587.20

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Solution

The fourth proportional to 485,734.20, 728,601.30 and 308,587.20 is: 462,880.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,734.20 : 728,601.30 = 308,587.20 : x
  2. Step 2: Convert to fraction form
    485,734.20/728,601.30 = 308,587.20/x
  3. Step 3: Cross multiply
    485,734.20x = 728,601.30 × 308,587.20
  4. Step 4: Simplify right side
    485,734.20x = 224,837,035,083.36
  5. Step 5: Solve for x
    x = 224,837,035,083.36/485,734.20
  6. Step 6: Final answer
    x = 462,880.80

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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.