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Finding the Fourth Proportional to 611,807.56, 917,842.66 and 256,616.88

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Solution

The fourth proportional to 611,807.56, 917,842.66 and 256,616.88 is: 384,980.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,807.56 : 917,842.66 = 256,616.88 : x
  2. Step 2: Convert to fraction form
    611,807.56/917,842.66 = 256,616.88/x
  3. Step 3: Cross multiply
    611,807.56x = 917,842.66 × 256,616.88
  4. Step 4: Simplify right side
    611,807.56x = 235,533,919,740.10
  5. Step 5: Solve for x
    x = 235,533,919,740.10/611,807.56
  6. Step 6: Final answer
    x = 384,980.40

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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.