Home / 687,930.60-1,031,021.10-612,697.80

Finding the Fourth Proportional to 687,930.60, 1,031,021.10 and 612,697.80

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Solution

The fourth proportional to 687,930.60, 1,031,021.10 and 612,697.80 is: 918,267.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,930.60 : 1,031,021.10 = 612,697.80 : x
  2. Step 2: Convert to fraction form
    687,930.60/1,031,021.10 = 612,697.80/x
  3. Step 3: Cross multiply
    687,930.60x = 1,031,021.10 × 612,697.80
  4. Step 4: Simplify right side
    687,930.60x = 631,704,359,723.58
  5. Step 5: Solve for x
    x = 631,704,359,723.58/687,930.60
  6. Step 6: Final answer
    x = 918,267.57

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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.