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Finding the Fourth Proportional to 610,913.10, 916,807.05 and 256,181.70

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Solution

The fourth proportional to 610,913.10, 916,807.05 and 256,181.70 is: 384,455.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,913.10 : 916,807.05 = 256,181.70 : x
  2. Step 2: Convert to fraction form
    610,913.10/916,807.05 = 256,181.70/x
  3. Step 3: Cross multiply
    610,913.10x = 916,807.05 × 256,181.70
  4. Step 4: Simplify right side
    610,913.10x = 234,869,188,640.99
  5. Step 5: Solve for x
    x = 234,869,188,640.99/610,913.10
  6. Step 6: Final answer
    x = 384,455.97

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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.