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Finding the Fourth Proportional to 613,384.40, 919,529.40 and 239,320.40

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Solution

The fourth proportional to 613,384.40, 919,529.40 and 239,320.40 is: 358,767.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,384.40 : 919,529.40 = 239,320.40 : x
  2. Step 2: Convert to fraction form
    613,384.40/919,529.40 = 239,320.40/x
  3. Step 3: Cross multiply
    613,384.40x = 919,529.40 × 239,320.40
  4. Step 4: Simplify right side
    613,384.40x = 220,062,143,819.76
  5. Step 5: Solve for x
    x = 220,062,143,819.76/613,384.40
  6. Step 6: Final answer
    x = 358,767.10

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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.