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Finding the Fourth Proportional to 661,100.40, 991,650.60 and 380,386.80

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Solution

The fourth proportional to 661,100.40, 991,650.60 and 380,386.80 is: 570,580.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,100.40 : 991,650.60 = 380,386.80 : x
  2. Step 2: Convert to fraction form
    661,100.40/991,650.60 = 380,386.80/x
  3. Step 3: Cross multiply
    661,100.40x = 991,650.60 × 380,386.80
  4. Step 4: Simplify right side
    661,100.40x = 377,210,798,452.08
  5. Step 5: Solve for x
    x = 377,210,798,452.08/661,100.40
  6. Step 6: Final answer
    x = 570,580.20

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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.