Home / 819,375.40-1,229,063.10-258,466.60

Finding the Fourth Proportional to 819,375.40, 1,229,063.10 and 258,466.60

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Solution

The fourth proportional to 819,375.40, 1,229,063.10 and 258,466.60 is: 387,699.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,375.40 : 1,229,063.10 = 258,466.60 : x
  2. Step 2: Convert to fraction form
    819,375.40/1,229,063.10 = 258,466.60/x
  3. Step 3: Cross multiply
    819,375.40x = 1,229,063.10 × 258,466.60
  4. Step 4: Simplify right side
    819,375.40x = 317,671,760,642.46
  5. Step 5: Solve for x
    x = 317,671,760,642.46/819,375.40
  6. Step 6: Final answer
    x = 387,699.90

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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.