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Finding the Fourth Proportional to 481,812.10, 722,718.15 and 257,863.30

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Solution

The fourth proportional to 481,812.10, 722,718.15 and 257,863.30 is: 386,794.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,812.10 : 722,718.15 = 257,863.30 : x
  2. Step 2: Convert to fraction form
    481,812.10/722,718.15 = 257,863.30/x
  3. Step 3: Cross multiply
    481,812.10x = 722,718.15 × 257,863.30
  4. Step 4: Simplify right side
    481,812.10x = 186,362,487,128.90
  5. Step 5: Solve for x
    x = 186,362,487,128.90/481,812.10
  6. Step 6: Final answer
    x = 386,794.95

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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.