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Finding the Fourth Proportional to 619,995.29, 855,686.88 and 378,418.24

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Solution

The fourth proportional to 619,995.29, 855,686.88 and 378,418.24 is: 522,274.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,995.29 : 855,686.88 = 378,418.24 : x
  2. Step 2: Convert to fraction form
    619,995.29/855,686.88 = 378,418.24/x
  3. Step 3: Cross multiply
    619,995.29x = 855,686.88 × 378,418.24
  4. Step 4: Simplify right side
    619,995.29x = 323,807,521,228.60
  5. Step 5: Solve for x
    x = 323,807,521,228.60/619,995.29
  6. Step 6: Final answer
    x = 522,274.17

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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.