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Finding the Fourth Proportional to 709,075.23, 978,530.06 and 386,786.76

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Solution

The fourth proportional to 709,075.23, 978,530.06 and 386,786.76 is: 533,769.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,075.23 : 978,530.06 = 386,786.76 : x
  2. Step 2: Convert to fraction form
    709,075.23/978,530.06 = 386,786.76/x
  3. Step 3: Cross multiply
    709,075.23x = 978,530.06 × 386,786.76
  4. Step 4: Simplify right side
    709,075.23x = 378,482,472,436.97
  5. Step 5: Solve for x
    x = 378,482,472,436.97/709,075.23
  6. Step 6: Final answer
    x = 533,769.14

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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.