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Finding the Fourth Proportional to 441,012.30, 661,518.45 and 427,890.30

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Solution

The fourth proportional to 441,012.30, 661,518.45 and 427,890.30 is: 641,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    441,012.30 : 661,518.45 = 427,890.30 : x
  2. Step 2: Convert to fraction form
    441,012.30/661,518.45 = 427,890.30/x
  3. Step 3: Cross multiply
    441,012.30x = 661,518.45 × 427,890.30
  4. Step 4: Simplify right side
    441,012.30x = 283,057,328,026.04
  5. Step 5: Solve for x
    x = 283,057,328,026.04/441,012.30
  6. Step 6: Final answer
    x = 641,835.45

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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.