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Finding the Fourth Proportional to 247,078.31, 340,713.48 and 211,386.47

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Solution

The fourth proportional to 247,078.31, 340,713.48 and 211,386.47 is: 291,495.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,078.31 : 340,713.48 = 211,386.47 : x
  2. Step 2: Convert to fraction form
    247,078.31/340,713.48 = 211,386.47/x
  3. Step 3: Cross multiply
    247,078.31x = 340,713.48 × 211,386.47
  4. Step 4: Simplify right side
    247,078.31x = 72,022,218,115.05
  5. Step 5: Solve for x
    x = 72,022,218,115.05/247,078.31
  6. Step 6: Final answer
    x = 291,495.52

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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.