Home / 1,390,609.20-2,086,239.28-431,014.66

Finding the Fourth Proportional to 1,390,609.20, 2,086,239.28 and 431,014.66

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Solution

The fourth proportional to 1,390,609.20, 2,086,239.28 and 431,014.66 is: 646,622.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,609.20 : 2,086,239.28 = 431,014.66 : x
  2. Step 2: Convert to fraction form
    1,390,609.20/2,086,239.28 = 431,014.66/x
  3. Step 3: Cross multiply
    1,390,609.20x = 2,086,239.28 × 431,014.66
  4. Step 4: Simplify right side
    1,390,609.20x = 899,199,713,947.85
  5. Step 5: Solve for x
    x = 899,199,713,947.85/1,390,609.20
  6. Step 6: Final answer
    x = 646,622.87

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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.