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Finding the Fourth Proportional to 458,214.90, 686,739.15 and 408,059.70

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Solution

The fourth proportional to 458,214.90, 686,739.15 and 408,059.70 is: 611,570.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,214.90 : 686,739.15 = 408,059.70 : x
  2. Step 2: Convert to fraction form
    458,214.90/686,739.15 = 408,059.70/x
  3. Step 3: Cross multiply
    458,214.90x = 686,739.15 × 408,059.70
  4. Step 4: Simplify right side
    458,214.90x = 280,230,571,527.26
  5. Step 5: Solve for x
    x = 280,230,571,527.26/458,214.90
  6. Step 6: Final answer
    x = 611,570.19

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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.