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Finding the Fourth Proportional to 859,602.70, 1,289,404.05 and 219,905.20

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Solution

The fourth proportional to 859,602.70, 1,289,404.05 and 219,905.20 is: 329,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,602.70 : 1,289,404.05 = 219,905.20 : x
  2. Step 2: Convert to fraction form
    859,602.70/1,289,404.05 = 219,905.20/x
  3. Step 3: Cross multiply
    859,602.70x = 1,289,404.05 × 219,905.20
  4. Step 4: Simplify right side
    859,602.70x = 283,546,655,496.06
  5. Step 5: Solve for x
    x = 283,546,655,496.06/859,602.70
  6. Step 6: Final answer
    x = 329,857.80

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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.