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Finding the Fourth Proportional to 719,043, 992,240.70 and 396,690

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Solution

The fourth proportional to 719,043, 992,240.70 and 396,690 is: 547,410.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,043 : 992,240.70 = 396,690 : x
  2. Step 2: Convert to fraction form
    719,043/992,240.70 = 396,690/x
  3. Step 3: Cross multiply
    719,043x = 992,240.70 × 396,690
  4. Step 4: Simplify right side
    719,043x = 393,611,963,283
  5. Step 5: Solve for x
    x = 393,611,963,283/719,043
  6. Step 6: Final answer
    x = 547,410.88

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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.