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Finding the Fourth Proportional to 621,492.65, 857,172.61 and 425,375.36

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Solution

The fourth proportional to 621,492.65, 857,172.61 and 425,375.36 is: 586,684.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,492.65 : 857,172.61 = 425,375.36 : x
  2. Step 2: Convert to fraction form
    621,492.65/857,172.61 = 425,375.36/x
  3. Step 3: Cross multiply
    621,492.65x = 857,172.61 × 425,375.36
  4. Step 4: Simplify right side
    621,492.65x = 364,620,107,021.14
  5. Step 5: Solve for x
    x = 364,620,107,021.14/621,492.65
  6. Step 6: Final answer
    x = 586,684.51

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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.