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Finding the Fourth Proportional to 674,817.42, 931,219.76 and 399,353.84

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Solution

The fourth proportional to 674,817.42, 931,219.76 and 399,353.84 is: 551,091.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,817.42 : 931,219.76 = 399,353.84 : x
  2. Step 2: Convert to fraction form
    674,817.42/931,219.76 = 399,353.84/x
  3. Step 3: Cross multiply
    674,817.42x = 931,219.76 × 399,353.84
  4. Step 4: Simplify right side
    674,817.42x = 371,886,183,382.16
  5. Step 5: Solve for x
    x = 371,886,183,382.16/674,817.42
  6. Step 6: Final answer
    x = 551,091.56

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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.