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Finding the Fourth Proportional to 619,555.50, 855,001.32 and 347,643.51

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Solution

The fourth proportional to 619,555.50, 855,001.32 and 347,643.51 is: 479,756.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,555.50 : 855,001.32 = 347,643.51 : x
  2. Step 2: Convert to fraction form
    619,555.50/855,001.32 = 347,643.51/x
  3. Step 3: Cross multiply
    619,555.50x = 855,001.32 × 347,643.51
  4. Step 4: Simplify right side
    619,555.50x = 297,235,659,939.43
  5. Step 5: Solve for x
    x = 297,235,659,939.43/619,555.50
  6. Step 6: Final answer
    x = 479,756.31

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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.