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Finding the Fourth Proportional to 619,635.43, 855,374.28 and 378,014.29

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Solution

The fourth proportional to 619,635.43, 855,374.28 and 378,014.29 is: 521,828.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,635.43 : 855,374.28 = 378,014.29 : x
  2. Step 2: Convert to fraction form
    619,635.43/855,374.28 = 378,014.29/x
  3. Step 3: Cross multiply
    619,635.43x = 855,374.28 × 378,014.29
  4. Step 4: Simplify right side
    619,635.43x = 323,343,697,582.47
  5. Step 5: Solve for x
    x = 323,343,697,582.47/619,635.43
  6. Step 6: Final answer
    x = 521,828.94

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1.5x scale

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.