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Finding the Fourth Proportional to 714,786.01, 986,421.92 and 388,112.91

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Solution

The fourth proportional to 714,786.01, 986,421.92 and 388,112.91 is: 535,605.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,786.01 : 986,421.92 = 388,112.91 : x
  2. Step 2: Convert to fraction form
    714,786.01/986,421.92 = 388,112.91/x
  3. Step 3: Cross multiply
    714,786.01x = 986,421.92 × 388,112.91
  4. Step 4: Simplify right side
    714,786.01x = 382,843,081,858.99
  5. Step 5: Solve for x
    x = 382,843,081,858.99/714,786.01
  6. Step 6: Final answer
    x = 535,605.17

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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.