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Finding the Fourth Proportional to 618,307.40, 927,461.10 and 512,019.20

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Solution

The fourth proportional to 618,307.40, 927,461.10 and 512,019.20 is: 768,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,307.40 : 927,461.10 = 512,019.20 : x
  2. Step 2: Convert to fraction form
    618,307.40/927,461.10 = 512,019.20/x
  3. Step 3: Cross multiply
    618,307.40x = 927,461.10 × 512,019.20
  4. Step 4: Simplify right side
    618,307.40x = 474,877,890,453.12
  5. Step 5: Solve for x
    x = 474,877,890,453.12/618,307.40
  6. Step 6: Final answer
    x = 768,028.80

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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.