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Finding the Fourth Proportional to 619,309.20, 854,643.12 and 343,664.28

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Solution

The fourth proportional to 619,309.20, 854,643.12 and 343,664.28 is: 474,254.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,309.20 : 854,643.12 = 343,664.28 : x
  2. Step 2: Convert to fraction form
    619,309.20/854,643.12 = 343,664.28/x
  3. Step 3: Cross multiply
    619,309.20x = 854,643.12 × 343,664.28
  4. Step 4: Simplify right side
    619,309.20x = 293,710,312,491.75
  5. Step 5: Solve for x
    x = 293,710,312,491.75/619,309.20
  6. Step 6: Final answer
    x = 474,254.72

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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.