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Finding the Fourth Proportional to 491,448.31, 677,938.56 and 338,220.48

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Solution

The fourth proportional to 491,448.31, 677,938.56 and 338,220.48 is: 466,565.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,448.31 : 677,938.56 = 338,220.48 : x
  2. Step 2: Convert to fraction form
    491,448.31/677,938.56 = 338,220.48/x
  3. Step 3: Cross multiply
    491,448.31x = 677,938.56 × 338,220.48
  4. Step 4: Simplify right side
    491,448.31x = 229,292,708,328.67
  5. Step 5: Solve for x
    x = 229,292,708,328.67/491,448.31
  6. Step 6: Final answer
    x = 466,565.26

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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.