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Finding the Fourth Proportional to 719,440.40, 992,814 and 397,160.48

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Solution

The fourth proportional to 719,440.40, 992,814 and 397,160.48 is: 548,073.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,440.40 : 992,814 = 397,160.48 : x
  2. Step 2: Convert to fraction form
    719,440.40/992,814 = 397,160.48/x
  3. Step 3: Cross multiply
    719,440.40x = 992,814 × 397,160.48
  4. Step 4: Simplify right side
    719,440.40x = 394,306,484,790.72
  5. Step 5: Solve for x
    x = 394,306,484,790.72/719,440.40
  6. Step 6: Final answer
    x = 548,073.87

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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.