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Finding the Fourth Proportional to 719,259.12, 992,572.70 and 396,969.21

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Solution

The fourth proportional to 719,259.12, 992,572.70 and 396,969.21 is: 547,814.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,259.12 : 992,572.70 = 396,969.21 : x
  2. Step 2: Convert to fraction form
    719,259.12/992,572.70 = 396,969.21/x
  3. Step 3: Cross multiply
    719,259.12x = 992,572.70 × 396,969.21
  4. Step 4: Simplify right side
    719,259.12x = 394,020,800,586.57
  5. Step 5: Solve for x
    x = 394,020,800,586.57/719,259.12
  6. Step 6: Final answer
    x = 547,814.81

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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.