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Finding the Fourth Proportional to 661,636.40, 992,454.60 and 380,922.80

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Solution

The fourth proportional to 661,636.40, 992,454.60 and 380,922.80 is: 571,384.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,636.40 : 992,454.60 = 380,922.80 : x
  2. Step 2: Convert to fraction form
    661,636.40/992,454.60 = 380,922.80/x
  3. Step 3: Cross multiply
    661,636.40x = 992,454.60 × 380,922.80
  4. Step 4: Simplify right side
    661,636.40x = 378,048,585,104.88
  5. Step 5: Solve for x
    x = 378,048,585,104.88/661,636.40
  6. Step 6: Final answer
    x = 571,384.20

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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.