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Finding the Fourth Proportional to 610,445.20, 916,105.20 and 343,922.80

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Solution

The fourth proportional to 610,445.20, 916,105.20 and 343,922.80 is: 516,130.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,445.20 : 916,105.20 = 343,922.80 : x
  2. Step 2: Convert to fraction form
    610,445.20/916,105.20 = 343,922.80/x
  3. Step 3: Cross multiply
    610,445.20x = 916,105.20 × 343,922.80
  4. Step 4: Simplify right side
    610,445.20x = 315,069,465,478.56
  5. Step 5: Solve for x
    x = 315,069,465,478.56/610,445.20
  6. Step 6: Final answer
    x = 516,130.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.