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Finding the Fourth Proportional to 515,864.36, 711,962.34 and 289,522.28

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Solution

The fourth proportional to 515,864.36, 711,962.34 and 289,522.28 is: 399,579.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,864.36 : 711,962.34 = 289,522.28 : x
  2. Step 2: Convert to fraction form
    515,864.36/711,962.34 = 289,522.28/x
  3. Step 3: Cross multiply
    515,864.36x = 711,962.34 × 289,522.28
  4. Step 4: Simplify right side
    515,864.36x = 206,128,959,950.94
  5. Step 5: Solve for x
    x = 206,128,959,950.94/515,864.36
  6. Step 6: Final answer
    x = 399,579.77

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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.