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Finding the Fourth Proportional to 713,405.17, 984,498.89 and 391,108.35

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Solution

The fourth proportional to 713,405.17, 984,498.89 and 391,108.35 is: 539,729.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,405.17 : 984,498.89 = 391,108.35 : x
  2. Step 2: Convert to fraction form
    713,405.17/984,498.89 = 391,108.35/x
  3. Step 3: Cross multiply
    713,405.17x = 984,498.89 × 391,108.35
  4. Step 4: Simplify right side
    713,405.17x = 385,045,736,444.73
  5. Step 5: Solve for x
    x = 385,045,736,444.73/713,405.17
  6. Step 6: Final answer
    x = 539,729.39

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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.