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Finding the Fourth Proportional to 612,589.92, 845,250.21 and 357,891.90

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Solution

The fourth proportional to 612,589.92, 845,250.21 and 357,891.90 is: 493,818.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,589.92 : 845,250.21 = 357,891.90 : x
  2. Step 2: Convert to fraction form
    612,589.92/845,250.21 = 357,891.90/x
  3. Step 3: Cross multiply
    612,589.92x = 845,250.21 × 357,891.90
  4. Step 4: Simplify right side
    612,589.92x = 302,508,203,794.13
  5. Step 5: Solve for x
    x = 302,508,203,794.13/612,589.92
  6. Step 6: Final answer
    x = 493,818.45

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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.