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Finding the Fourth Proportional to 713,786.88, 985,027.32 and 391,499.63

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Solution

The fourth proportional to 713,786.88, 985,027.32 and 391,499.63 is: 540,270.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,786.88 : 985,027.32 = 391,499.63 : x
  2. Step 2: Convert to fraction form
    713,786.88/985,027.32 = 391,499.63/x
  3. Step 3: Cross multiply
    713,786.88x = 985,027.32 × 391,499.63
  4. Step 4: Simplify right side
    713,786.88x = 385,637,824,437.26
  5. Step 5: Solve for x
    x = 385,637,824,437.26/713,786.88
  6. Step 6: Final answer
    x = 540,270.26

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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.