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Finding the Fourth Proportional to 515,444.17, 711,348.47 and 289,104.25

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Solution

The fourth proportional to 515,444.17, 711,348.47 and 289,104.25 is: 398,983.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,444.17 : 711,348.47 = 289,104.25 : x
  2. Step 2: Convert to fraction form
    515,444.17/711,348.47 = 289,104.25/x
  3. Step 3: Cross multiply
    515,444.17x = 711,348.47 × 289,104.25
  4. Step 4: Simplify right side
    515,444.17x = 205,653,865,908.00
  5. Step 5: Solve for x
    x = 205,653,865,908.00/515,444.17
  6. Step 6: Final answer
    x = 398,983.79

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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.