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Finding the Fourth Proportional to 620,921.80, 930,000.30 and 510,329.80

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Solution

The fourth proportional to 620,921.80, 930,000.30 and 510,329.80 is: 764,358.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,921.80 : 930,000.30 = 510,329.80 : x
  2. Step 2: Convert to fraction form
    620,921.80/930,000.30 = 510,329.80/x
  3. Step 3: Cross multiply
    620,921.80x = 930,000.30 × 510,329.80
  4. Step 4: Simplify right side
    620,921.80x = 474,606,867,098.94
  5. Step 5: Solve for x
    x = 474,606,867,098.94/620,921.80
  6. Step 6: Final answer
    x = 764,358.52

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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.