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Finding the Fourth Proportional to 719,430.39, 992,820.92 and 397,133.55

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Solution

The fourth proportional to 719,430.39, 992,820.92 and 397,133.55 is: 548,048.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,430.39 : 992,820.92 = 397,133.55 : x
  2. Step 2: Convert to fraction form
    719,430.39/992,820.92 = 397,133.55/x
  3. Step 3: Cross multiply
    719,430.39x = 992,820.92 × 397,133.55
  4. Step 4: Simplify right side
    719,430.39x = 394,282,494,488.20
  5. Step 5: Solve for x
    x = 394,282,494,488.20/719,430.39
  6. Step 6: Final answer
    x = 548,048.15

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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.