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Finding the Fourth Proportional to 643,588.80, 965,383.20 and 614,064.30

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Solution

The fourth proportional to 643,588.80, 965,383.20 and 614,064.30 is: 921,096.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,588.80 : 965,383.20 = 614,064.30 : x
  2. Step 2: Convert to fraction form
    643,588.80/965,383.20 = 614,064.30/x
  3. Step 3: Cross multiply
    643,588.80x = 965,383.20 × 614,064.30
  4. Step 4: Simplify right side
    643,588.80x = 592,807,358,939.76
  5. Step 5: Solve for x
    x = 592,807,358,939.76/643,588.80
  6. Step 6: Final answer
    x = 921,096.45

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Double scale
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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.