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Finding the Fourth Proportional to 713,688, 984,889.44 and 395,736

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Solution

The fourth proportional to 713,688, 984,889.44 and 395,736 is: 546,115.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,688 : 984,889.44 = 395,736 : x
  2. Step 2: Convert to fraction form
    713,688/984,889.44 = 395,736/x
  3. Step 3: Cross multiply
    713,688x = 984,889.44 × 395,736
  4. Step 4: Simplify right side
    713,688x = 389,756,207,427.84
  5. Step 5: Solve for x
    x = 389,756,207,427.84/713,688
  6. Step 6: Final answer
    x = 546,115.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.