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Finding the Fourth Proportional to 379,861.40, 523,695.76 and 243,658.94

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Solution

The fourth proportional to 379,861.40, 523,695.76 and 243,658.94 is: 335,920.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,861.40 : 523,695.76 = 243,658.94 : x
  2. Step 2: Convert to fraction form
    379,861.40/523,695.76 = 243,658.94/x
  3. Step 3: Cross multiply
    379,861.40x = 523,695.76 × 243,658.94
  4. Step 4: Simplify right side
    379,861.40x = 127,603,150,536.47
  5. Step 5: Solve for x
    x = 127,603,150,536.47/379,861.40
  6. Step 6: Final answer
    x = 335,920.28

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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.