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Finding the Fourth Proportional to 421,485.59, 581,654.70 and 230,494.88

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Solution

The fourth proportional to 421,485.59, 581,654.70 and 230,494.88 is: 318,085.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,485.59 : 581,654.70 = 230,494.88 : x
  2. Step 2: Convert to fraction form
    421,485.59/581,654.70 = 230,494.88/x
  3. Step 3: Cross multiply
    421,485.59x = 581,654.70 × 230,494.88
  4. Step 4: Simplify right side
    421,485.59x = 134,068,427,369.66
  5. Step 5: Solve for x
    x = 134,068,427,369.66/421,485.59
  6. Step 6: Final answer
    x = 318,085.44

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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.