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Finding the Fourth Proportional to 576,085.20, 863,479.80 and 276,709.20

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Solution

The fourth proportional to 576,085.20, 863,479.80 and 276,709.20 is: 414,752.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,085.20 : 863,479.80 = 276,709.20 : x
  2. Step 2: Convert to fraction form
    576,085.20/863,479.80 = 276,709.20/x
  3. Step 3: Cross multiply
    576,085.20x = 863,479.80 × 276,709.20
  4. Step 4: Simplify right side
    576,085.20x = 238,932,804,674.16
  5. Step 5: Solve for x
    x = 238,932,804,674.16/576,085.20
  6. Step 6: Final answer
    x = 414,752.55

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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.