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Finding the Fourth Proportional to 517,455.79, 776,129.09 and 138,414.77

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Solution

The fourth proportional to 517,455.79, 776,129.09 and 138,414.77 is: 207,607.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,455.79 : 776,129.09 = 138,414.77 : x
  2. Step 2: Convert to fraction form
    517,455.79/776,129.09 = 138,414.77/x
  3. Step 3: Cross multiply
    517,455.79x = 776,129.09 × 138,414.77
  4. Step 4: Simplify right side
    517,455.79x = 107,427,727,820.42
  5. Step 5: Solve for x
    x = 107,427,727,820.42/517,455.79
  6. Step 6: Final answer
    x = 207,607.55

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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.