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Finding the Fourth Proportional to 554,653.64, 765,406.50 and 312,958.71

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Solution

The fourth proportional to 554,653.64, 765,406.50 and 312,958.71 is: 431,874.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,653.64 : 765,406.50 = 312,958.71 : x
  2. Step 2: Convert to fraction form
    554,653.64/765,406.50 = 312,958.71/x
  3. Step 3: Cross multiply
    554,653.64x = 765,406.50 × 312,958.71
  4. Step 4: Simplify right side
    554,653.64x = 239,540,630,865.62
  5. Step 5: Solve for x
    x = 239,540,630,865.62/554,653.64
  6. Step 6: Final answer
    x = 431,874.26

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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.