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Finding the Fourth Proportional to 520,057.20, 779,567.40 and 239,084.40

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Solution

The fourth proportional to 520,057.20, 779,567.40 and 239,084.40 is: 358,388.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,057.20 : 779,567.40 = 239,084.40 : x
  2. Step 2: Convert to fraction form
    520,057.20/779,567.40 = 239,084.40/x
  3. Step 3: Cross multiply
    520,057.20x = 779,567.40 × 239,084.40
  4. Step 4: Simplify right side
    520,057.20x = 186,382,404,088.56
  5. Step 5: Solve for x
    x = 186,382,404,088.56/520,057.20
  6. Step 6: Final answer
    x = 358,388.28

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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.