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Finding the Fourth Proportional to 718,784.98, 991,846.62 and 396,495.06

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Solution

The fourth proportional to 718,784.98, 991,846.62 and 396,495.06 is: 547,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,784.98 : 991,846.62 = 396,495.06 : x
  2. Step 2: Convert to fraction form
    718,784.98/991,846.62 = 396,495.06/x
  3. Step 3: Cross multiply
    718,784.98x = 991,846.62 × 396,495.06
  4. Step 4: Simplify right side
    718,784.98x = 393,262,285,107.70
  5. Step 5: Solve for x
    x = 393,262,285,107.70/718,784.98
  6. Step 6: Final answer
    x = 547,120.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.