Home / 809,162.96-1,212,729.51-429,145.74

Finding the Fourth Proportional to 809,162.96, 1,212,729.51 and 429,145.74

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Solution

The fourth proportional to 809,162.96, 1,212,729.51 and 429,145.74 is: 643,180.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,162.96 : 1,212,729.51 = 429,145.74 : x
  2. Step 2: Convert to fraction form
    809,162.96/1,212,729.51 = 429,145.74/x
  3. Step 3: Cross multiply
    809,162.96x = 1,212,729.51 × 429,145.74
  4. Step 4: Simplify right side
    809,162.96x = 520,437,702,988.79
  5. Step 5: Solve for x
    x = 520,437,702,988.79/809,162.96
  6. Step 6: Final answer
    x = 643,180.34

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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.