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Finding the Fourth Proportional to 321,707.20, 482,949.60 and 319,374.40

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Solution

The fourth proportional to 321,707.20, 482,949.60 and 319,374.40 is: 479,447.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,707.20 : 482,949.60 = 319,374.40 : x
  2. Step 2: Convert to fraction form
    321,707.20/482,949.60 = 319,374.40/x
  3. Step 3: Cross multiply
    321,707.20x = 482,949.60 × 319,374.40
  4. Step 4: Simplify right side
    321,707.20x = 154,241,738,730.24
  5. Step 5: Solve for x
    x = 154,241,738,730.24/321,707.20
  6. Step 6: Final answer
    x = 479,447.58

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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.