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Finding the Fourth Proportional to 458,806.80, 686,827.80 and 409,040.40

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Solution

The fourth proportional to 458,806.80, 686,827.80 and 409,040.40 is: 612,328.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,806.80 : 686,827.80 = 409,040.40 : x
  2. Step 2: Convert to fraction form
    458,806.80/686,827.80 = 409,040.40/x
  3. Step 3: Cross multiply
    458,806.80x = 686,827.80 × 409,040.40
  4. Step 4: Simplify right side
    458,806.80x = 280,940,318,043.12
  5. Step 5: Solve for x
    x = 280,940,318,043.12/458,806.80
  6. Step 6: Final answer
    x = 612,328.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.