Home / 638,971.96-881,776.38-352,504.12

Finding the Fourth Proportional to 638,971.96, 881,776.38 and 352,504.12

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Solution

The fourth proportional to 638,971.96, 881,776.38 and 352,504.12 is: 486,452.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,971.96 : 881,776.38 = 352,504.12 : x
  2. Step 2: Convert to fraction form
    638,971.96/881,776.38 = 352,504.12/x
  3. Step 3: Cross multiply
    638,971.96x = 881,776.38 × 352,504.12
  4. Step 4: Simplify right side
    638,971.96x = 310,829,806,868.69
  5. Step 5: Solve for x
    x = 310,829,806,868.69/638,971.96
  6. Step 6: Final answer
    x = 486,452.97

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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.