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Finding the Fourth Proportional to 719,308.50, 992,645.73 and 401,356.50

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Solution

The fourth proportional to 719,308.50, 992,645.73 and 401,356.50 is: 553,871.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,308.50 : 992,645.73 = 401,356.50 : x
  2. Step 2: Convert to fraction form
    719,308.50/992,645.73 = 401,356.50/x
  3. Step 3: Cross multiply
    719,308.50x = 992,645.73 × 401,356.50
  4. Step 4: Simplify right side
    719,308.50x = 398,404,815,932.75
  5. Step 5: Solve for x
    x = 398,404,815,932.75/719,308.50
  6. Step 6: Final answer
    x = 553,871.97

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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.