Home / 686,556.40-1,030,126.20-331,387.60

Finding the Fourth Proportional to 686,556.40, 1,030,126.20 and 331,387.60

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Solution

The fourth proportional to 686,556.40, 1,030,126.20 and 331,387.60 is: 497,222.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,556.40 : 1,030,126.20 = 331,387.60 : x
  2. Step 2: Convert to fraction form
    686,556.40/1,030,126.20 = 331,387.60/x
  3. Step 3: Cross multiply
    686,556.40x = 1,030,126.20 × 331,387.60
  4. Step 4: Simplify right side
    686,556.40x = 341,371,049,115.12
  5. Step 5: Solve for x
    x = 341,371,049,115.12/686,556.40
  6. Step 6: Final answer
    x = 497,222.15

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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.