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Finding the Fourth Proportional to 554,449.66, 765,076.29 and 312,736.29

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Solution

The fourth proportional to 554,449.66, 765,076.29 and 312,736.29 is: 431,539.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,449.66 : 765,076.29 = 312,736.29 : x
  2. Step 2: Convert to fraction form
    554,449.66/765,076.29 = 312,736.29/x
  3. Step 3: Cross multiply
    554,449.66x = 765,076.29 × 312,736.29
  4. Step 4: Simplify right side
    554,449.66x = 239,267,120,763.32
  5. Step 5: Solve for x
    x = 239,267,120,763.32/554,449.66
  6. Step 6: Final answer
    x = 431,539.85

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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.