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Finding the Fourth Proportional to 1,247,574.65, 1,721,663.30 and 688,787.03

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Solution

The fourth proportional to 1,247,574.65, 1,721,663.30 and 688,787.03 is: 950,531.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247,574.65 : 1,721,663.30 = 688,787.03 : x
  2. Step 2: Convert to fraction form
    1,247,574.65/1,721,663.30 = 688,787.03/x
  3. Step 3: Cross multiply
    1,247,574.65x = 1,721,663.30 × 688,787.03
  4. Step 4: Simplify right side
    1,247,574.65x = 1,185,859,339,014.75
  5. Step 5: Solve for x
    x = 1,185,859,339,014.75/1,247,574.65
  6. Step 6: Final answer
    x = 950,531.77

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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.