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Finding the Fourth Proportional to 719,065.36, 992,309.03 and 396,775.20

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Solution

The fourth proportional to 719,065.36, 992,309.03 and 396,775.20 is: 547,549.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,065.36 : 992,309.03 = 396,775.20 : x
  2. Step 2: Convert to fraction form
    719,065.36/992,309.03 = 396,775.20/x
  3. Step 3: Cross multiply
    719,065.36x = 992,309.03 × 396,775.20
  4. Step 4: Simplify right side
    719,065.36x = 393,723,613,840.06
  5. Step 5: Solve for x
    x = 393,723,613,840.06/719,065.36
  6. Step 6: Final answer
    x = 547,549.13

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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.