Home / 687,819.60-1,031,729.40-189,183.60

Finding the Fourth Proportional to 687,819.60, 1,031,729.40 and 189,183.60

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Solution

The fourth proportional to 687,819.60, 1,031,729.40 and 189,183.60 is: 283,775.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,819.60 : 1,031,729.40 = 189,183.60 : x
  2. Step 2: Convert to fraction form
    687,819.60/1,031,729.40 = 189,183.60/x
  3. Step 3: Cross multiply
    687,819.60x = 1,031,729.40 × 189,183.60
  4. Step 4: Simplify right side
    687,819.60x = 195,186,282,117.84
  5. Step 5: Solve for x
    x = 195,186,282,117.84/687,819.60
  6. Step 6: Final answer
    x = 283,775.40

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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.