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Finding the Fourth Proportional to 485,643.20, 728,464.80 and 153,252.80

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Solution

The fourth proportional to 485,643.20, 728,464.80 and 153,252.80 is: 229,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,643.20 : 728,464.80 = 153,252.80 : x
  2. Step 2: Convert to fraction form
    485,643.20/728,464.80 = 153,252.80/x
  3. Step 3: Cross multiply
    485,643.20x = 728,464.80 × 153,252.80
  4. Step 4: Simplify right side
    485,643.20x = 111,639,270,301.44
  5. Step 5: Solve for x
    x = 111,639,270,301.44/485,643.20
  6. Step 6: Final answer
    x = 229,879.20

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Similar ratio
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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.