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Finding the Fourth Proportional to 520,054.40, 778,769.40 and 415,078.40

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Solution

The fourth proportional to 520,054.40, 778,769.40 and 415,078.40 is: 621,570.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,054.40 : 778,769.40 = 415,078.40 : x
  2. Step 2: Convert to fraction form
    520,054.40/778,769.40 = 415,078.40/x
  3. Step 3: Cross multiply
    520,054.40x = 778,769.40 × 415,078.40
  4. Step 4: Simplify right side
    520,054.40x = 323,250,356,520.96
  5. Step 5: Solve for x
    x = 323,250,356,520.96/520,054.40
  6. Step 6: Final answer
    x = 621,570.28

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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.