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Finding the Fourth Proportional to 654,492.60, 981,738.90 and 211,260.60

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Solution

The fourth proportional to 654,492.60, 981,738.90 and 211,260.60 is: 316,890.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,492.60 : 981,738.90 = 211,260.60 : x
  2. Step 2: Convert to fraction form
    654,492.60/981,738.90 = 211,260.60/x
  3. Step 3: Cross multiply
    654,492.60x = 981,738.90 × 211,260.60
  4. Step 4: Simplify right side
    654,492.60x = 207,402,749,057.34
  5. Step 5: Solve for x
    x = 207,402,749,057.34/654,492.60
  6. Step 6: Final answer
    x = 316,890.90

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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.