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Finding the Fourth Proportional to 719,091.84, 992,340 and 396,804.72

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Solution

The fourth proportional to 719,091.84, 992,340 and 396,804.72 is: 547,586.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,091.84 : 992,340 = 396,804.72 : x
  2. Step 2: Convert to fraction form
    719,091.84/992,340 = 396,804.72/x
  3. Step 3: Cross multiply
    719,091.84x = 992,340 × 396,804.72
  4. Step 4: Simplify right side
    719,091.84x = 393,765,195,844.80
  5. Step 5: Solve for x
    x = 393,765,195,844.80/719,091.84
  6. Step 6: Final answer
    x = 547,586.79

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1.5x scale

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.