Home / 639,214.12-957,640.20-322,915.60

Finding the Fourth Proportional to 639,214.12, 957,640.20 and 322,915.60

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Solution

The fourth proportional to 639,214.12, 957,640.20 and 322,915.60 is: 483,776.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,214.12 : 957,640.20 = 322,915.60 : x
  2. Step 2: Convert to fraction form
    639,214.12/957,640.20 = 322,915.60/x
  3. Step 3: Cross multiply
    639,214.12x = 957,640.20 × 322,915.60
  4. Step 4: Simplify right side
    639,214.12x = 309,236,959,767.12
  5. Step 5: Solve for x
    x = 309,236,959,767.12/639,214.12
  6. Step 6: Final answer
    x = 483,776.80

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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.