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Finding the Fourth Proportional to 279,000.54, 385,050.87 and 158,128.86

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Solution

The fourth proportional to 279,000.54, 385,050.87 and 158,128.86 is: 218,234.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,000.54 : 385,050.87 = 158,128.86 : x
  2. Step 2: Convert to fraction form
    279,000.54/385,050.87 = 158,128.86/x
  3. Step 3: Cross multiply
    279,000.54x = 385,050.87 × 158,128.86
  4. Step 4: Simplify right side
    279,000.54x = 60,887,655,115.11
  5. Step 5: Solve for x
    x = 60,887,655,115.11/279,000.54
  6. Step 6: Final answer
    x = 218,234.90

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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.