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Finding the Fourth Proportional to 279,211.57, 385,311.67 and 151,886.86

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Solution

The fourth proportional to 279,211.57, 385,311.67 and 151,886.86 is: 209,603.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,211.57 : 385,311.67 = 151,886.86 : x
  2. Step 2: Convert to fraction form
    279,211.57/385,311.67 = 151,886.86/x
  3. Step 3: Cross multiply
    279,211.57x = 385,311.67 × 151,886.86
  4. Step 4: Simplify right side
    279,211.57x = 58,523,779,677.66
  5. Step 5: Solve for x
    x = 58,523,779,677.66/279,211.57
  6. Step 6: Final answer
    x = 209,603.71

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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.