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Finding the Fourth Proportional to 719,309.50, 992,647.11 and 401,357.50

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Solution

The fourth proportional to 719,309.50, 992,647.11 and 401,357.50 is: 553,873.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,309.50 : 992,647.11 = 401,357.50 : x
  2. Step 2: Convert to fraction form
    719,309.50/992,647.11 = 401,357.50/x
  3. Step 3: Cross multiply
    719,309.50x = 992,647.11 × 401,357.50
  4. Step 4: Simplify right side
    719,309.50x = 398,406,362,451.83
  5. Step 5: Solve for x
    x = 398,406,362,451.83/719,309.50
  6. Step 6: Final answer
    x = 553,873.35

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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.