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Finding the Fourth Proportional to 674,790.56, 931,211.88 and 388,304.96

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Solution

The fourth proportional to 674,790.56, 931,211.88 and 388,304.96 is: 535,861.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,790.56 : 931,211.88 = 388,304.96 : x
  2. Step 2: Convert to fraction form
    674,790.56/931,211.88 = 388,304.96/x
  3. Step 3: Cross multiply
    674,790.56x = 931,211.88 × 388,304.96
  4. Step 4: Simplify right side
    674,790.56x = 361,594,191,814.93
  5. Step 5: Solve for x
    x = 361,594,191,814.93/674,790.56
  6. Step 6: Final answer
    x = 535,861.37

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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.