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Finding the Fourth Proportional to 713,806.40, 985,054.24 and 391,519.12

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Solution

The fourth proportional to 713,806.40, 985,054.24 and 391,519.12 is: 540,297.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,806.40 : 985,054.24 = 391,519.12 : x
  2. Step 2: Convert to fraction form
    713,806.40/985,054.24 = 391,519.12/x
  3. Step 3: Cross multiply
    713,806.40x = 985,054.24 × 391,519.12
  4. Step 4: Simplify right side
    713,806.40x = 385,667,569,197.07
  5. Step 5: Solve for x
    x = 385,667,569,197.07/713,806.40
  6. Step 6: Final answer
    x = 540,297.16

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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.