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Finding the Fourth Proportional to 619,521, 855,239.31 and 415,497.30

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Solution

The fourth proportional to 619,521, 855,239.31 and 415,497.30 is: 573,587.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,521 : 855,239.31 = 415,497.30 : x
  2. Step 2: Convert to fraction form
    619,521/855,239.31 = 415,497.30/x
  3. Step 3: Cross multiply
    619,521x = 855,239.31 × 415,497.30
  4. Step 4: Simplify right side
    619,521x = 355,349,624,158.86
  5. Step 5: Solve for x
    x = 355,349,624,158.86/619,521
  6. Step 6: Final answer
    x = 573,587.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.