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Finding the Fourth Proportional to 519,357.85, 779,036.78 and 239,421.85

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Solution

The fourth proportional to 519,357.85, 779,036.78 and 239,421.85 is: 359,132.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,357.85 : 779,036.78 = 239,421.85 : x
  2. Step 2: Convert to fraction form
    519,357.85/779,036.78 = 239,421.85/x
  3. Step 3: Cross multiply
    519,357.85x = 779,036.78 × 239,421.85
  4. Step 4: Simplify right side
    519,357.85x = 186,518,425,888.53
  5. Step 5: Solve for x
    x = 186,518,425,888.53/519,357.85
  6. Step 6: Final answer
    x = 359,132.78

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Double scale
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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.