Home / 756,128.90-1,042,996.56-450,000.20

Finding the Fourth Proportional to 756,128.90, 1,042,996.56 and 450,000.20

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Solution

The fourth proportional to 756,128.90, 1,042,996.56 and 450,000.20 is: 620,725.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    756,128.90 : 1,042,996.56 = 450,000.20 : x
  2. Step 2: Convert to fraction form
    756,128.90/1,042,996.56 = 450,000.20/x
  3. Step 3: Cross multiply
    756,128.90x = 1,042,996.56 × 450,000.20
  4. Step 4: Simplify right side
    756,128.90x = 469,348,660,599.31
  5. Step 5: Solve for x
    x = 469,348,660,599.31/756,128.90
  6. Step 6: Final answer
    x = 620,725.73

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.