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Finding the Fourth Proportional to 657,714.80, 986,572.20 and 405,772.40

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Solution

The fourth proportional to 657,714.80, 986,572.20 and 405,772.40 is: 608,658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,714.80 : 986,572.20 = 405,772.40 : x
  2. Step 2: Convert to fraction form
    657,714.80/986,572.20 = 405,772.40/x
  3. Step 3: Cross multiply
    657,714.80x = 986,572.20 × 405,772.40
  4. Step 4: Simplify right side
    657,714.80x = 400,323,769,367.28
  5. Step 5: Solve for x
    x = 400,323,769,367.28/657,714.80
  6. Step 6: Final answer
    x = 608,658.60

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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.