Home / 638,221.36-880,728.12-351,741.34

Finding the Fourth Proportional to 638,221.36, 880,728.12 and 351,741.34

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Solution

The fourth proportional to 638,221.36, 880,728.12 and 351,741.34 is: 485,393.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,221.36 : 880,728.12 = 351,741.34 : x
  2. Step 2: Convert to fraction form
    638,221.36/880,728.12 = 351,741.34/x
  3. Step 3: Cross multiply
    638,221.36x = 880,728.12 × 351,741.34
  4. Step 4: Simplify right side
    638,221.36x = 309,788,489,104.48
  5. Step 5: Solve for x
    x = 309,788,489,104.48/638,221.36
  6. Step 6: Final answer
    x = 485,393.48

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Double scale
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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.