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Finding the Fourth Proportional to 709,117.45, 978,595.96 and 386,839.51

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Solution

The fourth proportional to 709,117.45, 978,595.96 and 386,839.51 is: 533,846.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,117.45 : 978,595.96 = 386,839.51 : x
  2. Step 2: Convert to fraction form
    709,117.45/978,595.96 = 386,839.51/x
  3. Step 3: Cross multiply
    709,117.45x = 978,595.96 × 386,839.51
  4. Step 4: Simplify right side
    709,117.45x = 378,559,581,654.38
  5. Step 5: Solve for x
    x = 378,559,581,654.38/709,117.45
  6. Step 6: Final answer
    x = 533,846.10

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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.