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Finding the Fourth Proportional to 709,186.66, 978,672.95 and 403,263.07

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Solution

The fourth proportional to 709,186.66, 978,672.95 and 403,263.07 is: 556,500.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,186.66 : 978,672.95 = 403,263.07 : x
  2. Step 2: Convert to fraction form
    709,186.66/978,672.95 = 403,263.07/x
  3. Step 3: Cross multiply
    709,186.66x = 978,672.95 × 403,263.07
  4. Step 4: Simplify right side
    709,186.66x = 394,662,651,433.28
  5. Step 5: Solve for x
    x = 394,662,651,433.28/709,186.66
  6. Step 6: Final answer
    x = 556,500.39

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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.