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Finding the Fourth Proportional to 687,403.60, 1,030,230.60 and 331,651.60

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Solution

The fourth proportional to 687,403.60, 1,030,230.60 and 331,651.60 is: 497,055.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,403.60 : 1,030,230.60 = 331,651.60 : x
  2. Step 2: Convert to fraction form
    687,403.60/1,030,230.60 = 331,651.60/x
  3. Step 3: Cross multiply
    687,403.60x = 1,030,230.60 × 331,651.60
  4. Step 4: Simplify right side
    687,403.60x = 341,677,626,858.96
  5. Step 5: Solve for x
    x = 341,677,626,858.96/687,403.60
  6. Step 6: Final answer
    x = 497,055.34

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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.