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Finding the Fourth Proportional to 618,703.70, 928,055.55 and 543,908.30

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Solution

The fourth proportional to 618,703.70, 928,055.55 and 543,908.30 is: 815,862.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,703.70 : 928,055.55 = 543,908.30 : x
  2. Step 2: Convert to fraction form
    618,703.70/928,055.55 = 543,908.30/x
  3. Step 3: Cross multiply
    618,703.70x = 928,055.55 × 543,908.30
  4. Step 4: Simplify right side
    618,703.70x = 504,777,116,506.07
  5. Step 5: Solve for x
    x = 504,777,116,506.07/618,703.70
  6. Step 6: Final answer
    x = 815,862.45

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Similar ratio
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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.