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Finding the Fourth Proportional to 713,663.88, 984,765.63 and 391,289.14

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Solution

The fourth proportional to 713,663.88, 984,765.63 and 391,289.14 is: 539,929.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,663.88 : 984,765.63 = 391,289.14 : x
  2. Step 2: Convert to fraction form
    713,663.88/984,765.63 = 391,289.14/x
  3. Step 3: Cross multiply
    713,663.88x = 984,765.63 × 391,289.14
  4. Step 4: Simplify right side
    713,663.88x = 385,328,096,464.26
  5. Step 5: Solve for x
    x = 385,328,096,464.26/713,663.88
  6. Step 6: Final answer
    x = 539,929.38

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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.