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Finding the Fourth Proportional to 212,970.80, 319,067.40 and 173,313.20

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Solution

The fourth proportional to 212,970.80, 319,067.40 and 173,313.20 is: 259,653.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,970.80 : 319,067.40 = 173,313.20 : x
  2. Step 2: Convert to fraction form
    212,970.80/319,067.40 = 173,313.20/x
  3. Step 3: Cross multiply
    212,970.80x = 319,067.40 × 173,313.20
  4. Step 4: Simplify right side
    212,970.80x = 55,298,592,109.68
  5. Step 5: Solve for x
    x = 55,298,592,109.68/212,970.80
  6. Step 6: Final answer
    x = 259,653.40

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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.