Home / 862,479.20-1,293,718.80-389,391.20

Finding the Fourth Proportional to 862,479.20, 1,293,718.80 and 389,391.20

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Solution

The fourth proportional to 862,479.20, 1,293,718.80 and 389,391.20 is: 584,086.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,479.20 : 1,293,718.80 = 389,391.20 : x
  2. Step 2: Convert to fraction form
    862,479.20/1,293,718.80 = 389,391.20/x
  3. Step 3: Cross multiply
    862,479.20x = 1,293,718.80 × 389,391.20
  4. Step 4: Simplify right side
    862,479.20x = 503,762,715,994.56
  5. Step 5: Solve for x
    x = 503,762,715,994.56/862,479.20
  6. Step 6: Final answer
    x = 584,086.80

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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.