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Finding the Fourth Proportional to 485,515.50, 728,273.25 and 153,091.50

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Solution

The fourth proportional to 485,515.50, 728,273.25 and 153,091.50 is: 229,637.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,515.50 : 728,273.25 = 153,091.50 : x
  2. Step 2: Convert to fraction form
    485,515.50/728,273.25 = 153,091.50/x
  3. Step 3: Cross multiply
    485,515.50x = 728,273.25 × 153,091.50
  4. Step 4: Simplify right side
    485,515.50x = 111,492,444,252.38
  5. Step 5: Solve for x
    x = 111,492,444,252.38/485,515.50
  6. Step 6: Final answer
    x = 229,637.25

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Double scale
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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.