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Finding the Fourth Proportional to 661,551.40, 991,232.70 and 380,578.60

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Solution

The fourth proportional to 661,551.40, 991,232.70 and 380,578.60 is: 570,238.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,551.40 : 991,232.70 = 380,578.60 : x
  2. Step 2: Convert to fraction form
    661,551.40/991,232.70 = 380,578.60/x
  3. Step 3: Cross multiply
    661,551.40x = 991,232.70 × 380,578.60
  4. Step 4: Simplify right side
    661,551.40x = 377,241,953,240.22
  5. Step 5: Solve for x
    x = 377,241,953,240.22/661,551.40
  6. Step 6: Final answer
    x = 570,238.31

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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.