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Finding the Fourth Proportional to 319,108.80, 478,432.80 and 178,910.40

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Solution

The fourth proportional to 319,108.80, 478,432.80 and 178,910.40 is: 268,236.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,108.80 : 478,432.80 = 178,910.40 : x
  2. Step 2: Convert to fraction form
    319,108.80/478,432.80 = 178,910.40/x
  3. Step 3: Cross multiply
    319,108.80x = 478,432.80 × 178,910.40
  4. Step 4: Simplify right side
    319,108.80x = 85,596,603,621.12
  5. Step 5: Solve for x
    x = 85,596,603,621.12/319,108.80
  6. Step 6: Final answer
    x = 268,236.42

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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.