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Finding the Fourth Proportional to 660,128.80, 990,193.20 and 161,492.80

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Solution

The fourth proportional to 660,128.80, 990,193.20 and 161,492.80 is: 242,239.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,128.80 : 990,193.20 = 161,492.80 : x
  2. Step 2: Convert to fraction form
    660,128.80/990,193.20 = 161,492.80/x
  3. Step 3: Cross multiply
    660,128.80x = 990,193.20 × 161,492.80
  4. Step 4: Simplify right side
    660,128.80x = 159,909,072,408.96
  5. Step 5: Solve for x
    x = 159,909,072,408.96/660,128.80
  6. Step 6: Final answer
    x = 242,239.20

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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.