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Finding the Fourth Proportional to 486,985.80, 730,478.70 and 412,336.20

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Solution

The fourth proportional to 486,985.80, 730,478.70 and 412,336.20 is: 618,504.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,985.80 : 730,478.70 = 412,336.20 : x
  2. Step 2: Convert to fraction form
    486,985.80/730,478.70 = 412,336.20/x
  3. Step 3: Cross multiply
    486,985.80x = 730,478.70 × 412,336.20
  4. Step 4: Simplify right side
    486,985.80x = 301,202,811,338.94
  5. Step 5: Solve for x
    x = 301,202,811,338.94/486,985.80
  6. Step 6: Final answer
    x = 618,504.30

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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.