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Finding the Fourth Proportional to 421,520.66, 581,703.10 and 230,529.95

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Solution

The fourth proportional to 421,520.66, 581,703.10 and 230,529.95 is: 318,133.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,520.66 : 581,703.10 = 230,529.95 : x
  2. Step 2: Convert to fraction form
    421,520.66/581,703.10 = 230,529.95/x
  3. Step 3: Cross multiply
    421,520.66x = 581,703.10 × 230,529.95
  4. Step 4: Simplify right side
    421,520.66x = 134,099,982,496.68
  5. Step 5: Solve for x
    x = 134,099,982,496.68/421,520.66
  6. Step 6: Final answer
    x = 318,133.83

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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.