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Finding the Fourth Proportional to 611,272.80, 916,909.20 and 161,992.80

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Solution

The fourth proportional to 611,272.80, 916,909.20 and 161,992.80 is: 242,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,272.80 : 916,909.20 = 161,992.80 : x
  2. Step 2: Convert to fraction form
    611,272.80/916,909.20 = 161,992.80/x
  3. Step 3: Cross multiply
    611,272.80x = 916,909.20 × 161,992.80
  4. Step 4: Simplify right side
    611,272.80x = 148,532,688,653.76
  5. Step 5: Solve for x
    x = 148,532,688,653.76/611,272.80
  6. Step 6: Final answer
    x = 242,989.20

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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.