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Finding the Fourth Proportional to 278,683.51, 384,559.77 and 154,507.81

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Solution

The fourth proportional to 278,683.51, 384,559.77 and 154,507.81 is: 213,207.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,683.51 : 384,559.77 = 154,507.81 : x
  2. Step 2: Convert to fraction form
    278,683.51/384,559.77 = 154,507.81/x
  3. Step 3: Cross multiply
    278,683.51x = 384,559.77 × 154,507.81
  4. Step 4: Simplify right side
    278,683.51x = 59,417,487,876.80
  5. Step 5: Solve for x
    x = 59,417,487,876.80/278,683.51
  6. Step 6: Final answer
    x = 213,207.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.