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Finding the Fourth Proportional to 554,859.12, 765,708.21 and 313,151.88

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Solution

The fourth proportional to 554,859.12, 765,708.21 and 313,151.88 is: 432,151.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,859.12 : 765,708.21 = 313,151.88 : x
  2. Step 2: Convert to fraction form
    554,859.12/765,708.21 = 313,151.88/x
  3. Step 3: Cross multiply
    554,859.12x = 765,708.21 × 313,151.88
  4. Step 4: Simplify right side
    554,859.12x = 239,782,965,492.94
  5. Step 5: Solve for x
    x = 239,782,965,492.94/554,859.12
  6. Step 6: Final answer
    x = 432,151.08

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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.