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Finding the Fourth Proportional to 553,698.80, 775,703.20 and 553,698.80

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Solution

The fourth proportional to 553,698.80, 775,703.20 and 553,698.80 is: 775,703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,698.80 : 775,703.20 = 553,698.80 : x
  2. Step 2: Convert to fraction form
    553,698.80/775,703.20 = 553,698.80/x
  3. Step 3: Cross multiply
    553,698.80x = 775,703.20 × 553,698.80
  4. Step 4: Simplify right side
    553,698.80x = 429,505,930,996.16
  5. Step 5: Solve for x
    x = 429,505,930,996.16/553,698.80
  6. Step 6: Final answer
    x = 775,703.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.