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Finding the Fourth Proportional to 543,081.78, 814,359.60 and 318,515.76

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Solution

The fourth proportional to 543,081.78, 814,359.60 and 318,515.76 is: 477,619.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,081.78 : 814,359.60 = 318,515.76 : x
  2. Step 2: Convert to fraction form
    543,081.78/814,359.60 = 318,515.76/x
  3. Step 3: Cross multiply
    543,081.78x = 814,359.60 × 318,515.76
  4. Step 4: Simplify right side
    543,081.78x = 259,386,366,907.30
  5. Step 5: Solve for x
    x = 259,386,366,907.30/543,081.78
  6. Step 6: Final answer
    x = 477,619.35

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1.5x scale

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.