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Finding the Fourth Proportional to 421,665.60, 581,873.76 and 230,640.96

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Solution

The fourth proportional to 421,665.60, 581,873.76 and 230,640.96 is: 318,270.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,665.60 : 581,873.76 = 230,640.96 : x
  2. Step 2: Convert to fraction form
    421,665.60/581,873.76 = 230,640.96/x
  3. Step 3: Cross multiply
    421,665.60x = 581,873.76 × 230,640.96
  4. Step 4: Simplify right side
    421,665.60x = 134,203,922,605.21
  5. Step 5: Solve for x
    x = 134,203,922,605.21/421,665.60
  6. Step 6: Final answer
    x = 318,270.98

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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.