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Finding the Fourth Proportional to 865,435.68, 1,194,299.64 and 521,470.80

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Solution

The fourth proportional to 865,435.68, 1,194,299.64 and 521,470.80 is: 719,628.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,435.68 : 1,194,299.64 = 521,470.80 : x
  2. Step 2: Convert to fraction form
    865,435.68/1,194,299.64 = 521,470.80/x
  3. Step 3: Cross multiply
    865,435.68x = 1,194,299.64 × 521,470.80
  4. Step 4: Simplify right side
    865,435.68x = 622,792,388,710.51
  5. Step 5: Solve for x
    x = 622,792,388,710.51/865,435.68
  6. Step 6: Final answer
    x = 719,628.74

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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.