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Finding the Fourth Proportional to 515,816.70, 773,725.05 and 397,718.70

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Solution

The fourth proportional to 515,816.70, 773,725.05 and 397,718.70 is: 596,578.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,816.70 : 773,725.05 = 397,718.70 : x
  2. Step 2: Convert to fraction form
    515,816.70/773,725.05 = 397,718.70/x
  3. Step 3: Cross multiply
    515,816.70x = 773,725.05 × 397,718.70
  4. Step 4: Simplify right side
    515,816.70x = 307,724,921,043.44
  5. Step 5: Solve for x
    x = 307,724,921,043.44/515,816.70
  6. Step 6: Final answer
    x = 596,578.05

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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.