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Finding the Fourth Proportional to 554,426.28, 765,107.22 and 312,708.12

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Solution

The fourth proportional to 554,426.28, 765,107.22 and 312,708.12 is: 431,536.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,426.28 : 765,107.22 = 312,708.12 : x
  2. Step 2: Convert to fraction form
    554,426.28/765,107.22 = 312,708.12/x
  3. Step 3: Cross multiply
    554,426.28x = 765,107.22 × 312,708.12
  4. Step 4: Simplify right side
    554,426.28x = 239,255,240,364.63
  5. Step 5: Solve for x
    x = 239,255,240,364.63/554,426.28
  6. Step 6: Final answer
    x = 431,536.62

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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.