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Finding the Fourth Proportional to 381,861.98, 526,911 and 220,685.93

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Solution

The fourth proportional to 381,861.98, 526,911 and 220,685.93 is: 304,512.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,861.98 : 526,911 = 220,685.93 : x
  2. Step 2: Convert to fraction form
    381,861.98/526,911 = 220,685.93/x
  3. Step 3: Cross multiply
    381,861.98x = 526,911 × 220,685.93
  4. Step 4: Simplify right side
    381,861.98x = 116,281,844,062.23
  5. Step 5: Solve for x
    x = 116,281,844,062.23/381,861.98
  6. Step 6: Final answer
    x = 304,512.76

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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.