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Finding the Fourth Proportional to 646,765.49, 969,412.55 and 393,487.71

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Solution

The fourth proportional to 646,765.49, 969,412.55 and 393,487.71 is: 589,783.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,765.49 : 969,412.55 = 393,487.71 : x
  2. Step 2: Convert to fraction form
    646,765.49/969,412.55 = 393,487.71/x
  3. Step 3: Cross multiply
    646,765.49x = 969,412.55 × 393,487.71
  4. Step 4: Simplify right side
    646,765.49x = 381,451,922,377.32
  5. Step 5: Solve for x
    x = 381,451,922,377.32/646,765.49
  6. Step 6: Final answer
    x = 589,783.98

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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.