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Finding the Fourth Proportional to 321,603.20, 443,838.98 and 178,409.40

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Solution

The fourth proportional to 321,603.20, 443,838.98 and 178,409.40 is: 246,219.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,603.20 : 443,838.98 = 178,409.40 : x
  2. Step 2: Convert to fraction form
    321,603.20/443,838.98 = 178,409.40/x
  3. Step 3: Cross multiply
    321,603.20x = 443,838.98 × 178,409.40
  4. Step 4: Simplify right side
    321,603.20x = 79,185,046,118.41
  5. Step 5: Solve for x
    x = 79,185,046,118.41/321,603.20
  6. Step 6: Final answer
    x = 246,219.71

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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.