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Finding the Fourth Proportional to 455,363.20, 683,606.40 and 286,883.20

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Solution

The fourth proportional to 455,363.20, 683,606.40 and 286,883.20 is: 430,678.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,363.20 : 683,606.40 = 286,883.20 : x
  2. Step 2: Convert to fraction form
    455,363.20/683,606.40 = 286,883.20/x
  3. Step 3: Cross multiply
    455,363.20x = 683,606.40 × 286,883.20
  4. Step 4: Simplify right side
    455,363.20x = 196,115,191,572.48
  5. Step 5: Solve for x
    x = 196,115,191,572.48/455,363.20
  6. Step 6: Final answer
    x = 430,678.61

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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.