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Finding the Fourth Proportional to 457,809.40, 686,714.10 and 369,235.90

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Solution

The fourth proportional to 457,809.40, 686,714.10 and 369,235.90 is: 553,853.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,809.40 : 686,714.10 = 369,235.90 : x
  2. Step 2: Convert to fraction form
    457,809.40/686,714.10 = 369,235.90/x
  3. Step 3: Cross multiply
    457,809.40x = 686,714.10 × 369,235.90
  4. Step 4: Simplify right side
    457,809.40x = 253,559,498,756.19
  5. Step 5: Solve for x
    x = 253,559,498,756.19/457,809.40
  6. Step 6: Final answer
    x = 553,853.85

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Similar ratio
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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.