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Finding the Fourth Proportional to 653,986.72, 980,970.36 and 180,661.60

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Solution

The fourth proportional to 653,986.72, 980,970.36 and 180,661.60 is: 270,989.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,986.72 : 980,970.36 = 180,661.60 : x
  2. Step 2: Convert to fraction form
    653,986.72/980,970.36 = 180,661.60/x
  3. Step 3: Cross multiply
    653,986.72x = 980,970.36 × 180,661.60
  4. Step 4: Simplify right side
    653,986.72x = 177,223,674,790.18
  5. Step 5: Solve for x
    x = 177,223,674,790.18/653,986.72
  6. Step 6: Final answer
    x = 270,989.71

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Double scale
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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.