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Finding the Fourth Proportional to 554,816.52, 765,687.28 and 313,120.24

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Solution

The fourth proportional to 554,816.52, 765,687.28 and 313,120.24 is: 432,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,816.52 : 765,687.28 = 313,120.24 : x
  2. Step 2: Convert to fraction form
    554,816.52/765,687.28 = 313,120.24/x
  3. Step 3: Cross multiply
    554,816.52x = 765,687.28 × 313,120.24
  4. Step 4: Simplify right side
    554,816.52x = 239,752,184,878.55
  5. Step 5: Solve for x
    x = 239,752,184,878.55/554,816.52
  6. Step 6: Final answer
    x = 432,128.78

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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.