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Finding the Fourth Proportional to 456,215.20, 683,545.20 and 389,341.60

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Solution

The fourth proportional to 456,215.20, 683,545.20 and 389,341.60 is: 583,348.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,215.20 : 683,545.20 = 389,341.60 : x
  2. Step 2: Convert to fraction form
    456,215.20/683,545.20 = 389,341.60/x
  3. Step 3: Cross multiply
    456,215.20x = 683,545.20 × 389,341.60
  4. Step 4: Simplify right side
    456,215.20x = 266,132,581,840.32
  5. Step 5: Solve for x
    x = 266,132,581,840.32/456,215.20
  6. Step 6: Final answer
    x = 583,348.78

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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.