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Finding the Fourth Proportional to 617,439.80, 927,714.90 and 392,907.80

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Solution

The fourth proportional to 617,439.80, 927,714.90 and 392,907.80 is: 590,351.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,439.80 : 927,714.90 = 392,907.80 : x
  2. Step 2: Convert to fraction form
    617,439.80/927,714.90 = 392,907.80/x
  3. Step 3: Cross multiply
    617,439.80x = 927,714.90 × 392,907.80
  4. Step 4: Simplify right side
    617,439.80x = 364,506,420,386.22
  5. Step 5: Solve for x
    x = 364,506,420,386.22/617,439.80
  6. Step 6: Final answer
    x = 590,351.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.