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Finding the Fourth Proportional to 458,812.20, 688,218.30 and 451,813.80

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Solution

The fourth proportional to 458,812.20, 688,218.30 and 451,813.80 is: 677,720.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,812.20 : 688,218.30 = 451,813.80 : x
  2. Step 2: Convert to fraction form
    458,812.20/688,218.30 = 451,813.80/x
  3. Step 3: Cross multiply
    458,812.20x = 688,218.30 × 451,813.80
  4. Step 4: Simplify right side
    458,812.20x = 310,946,525,352.54
  5. Step 5: Solve for x
    x = 310,946,525,352.54/458,812.20
  6. Step 6: Final answer
    x = 677,720.70

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Similar ratio
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1.5x scale

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.