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Finding the Fourth Proportional to 764,640.88, 1,055,248.18 and 425,131

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Solution

The fourth proportional to 764,640.88, 1,055,248.18 and 425,131 is: 586,705.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,640.88 : 1,055,248.18 = 425,131 : x
  2. Step 2: Convert to fraction form
    764,640.88/1,055,248.18 = 425,131/x
  3. Step 3: Cross multiply
    764,640.88x = 1,055,248.18 × 425,131
  4. Step 4: Simplify right side
    764,640.88x = 448,618,714,011.58
  5. Step 5: Solve for x
    x = 448,618,714,011.58/764,640.88
  6. Step 6: Final answer
    x = 586,705.11

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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.