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Finding the Fourth Proportional to 719,259.69, 992,573.47 and 396,969.78

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Solution

The fourth proportional to 719,259.69, 992,573.47 and 396,969.78 is: 547,815.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,259.69 : 992,573.47 = 396,969.78 : x
  2. Step 2: Convert to fraction form
    719,259.69/992,573.47 = 396,969.78/x
  3. Step 3: Cross multiply
    719,259.69x = 992,573.47 × 396,969.78
  4. Step 4: Simplify right side
    719,259.69x = 394,021,672,019.74
  5. Step 5: Solve for x
    x = 394,021,672,019.74/719,259.69
  6. Step 6: Final answer
    x = 547,815.59

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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.